Skywatcher secondary mirror screws. ) Were you using a collimating tool? 4.
Skywatcher secondary mirror screws The heater meant for the secondary mirror is an elliptical pad which is meant to 1 x Secondary Spider, suitable for TS-Optics GSO Photon 8" (with an inner tube diameter of 230mm, depends on the tube material), black matt anodized; 3 x stud screws M4x25 (with cone head) for adjustmet; 1 x stainless steel fixing screw M6x35 for mounting the secondary mirror holder; Please note! Blue rectangle is the clip securing the mirror to the secondary mirror assembly (black). 1. I immediately purchased a Moonlite focuser, the 2” (CR) version. I do not have long enough thumb screw on hand, so I cut the head of the M4 screw off, leaving a 30 mm long bare screw, then put a M4 thumb screw head (i. With an extremely useful 130mm of light gathering aperture, this telescope is a highly capable all-rounder for the observation of the Moon, bright planets, nebulae, galaxies and star clusters. They allways avoid the center and I can only move by the yellow area. The spider also comes standard with a secondary rotation optimization system, which ensures that the secondary mirror can be correctly positioned at all times, without the constraints typical of GSO cells (equipped with predetermined positions for the secondary collimation screws), and without the limitations typical of Skywatcher cells (made This popular reflecting design is still widely used today. (Fig. Knobs: Black plastic, 13 mm (1/2”) diameter Threads: Stainless steel Notes: Bob offers knobs with screws having either 30 mm or 35 mm length. The screw that determines the distance from the primary that the secondary sits runs out of travel before the secondary centers under the focuser. 357. Per the title, on the base of the telescope (see image below), I cant seem to unlock/lock the hex screws (the one right above the pictured philips head screw Jul 21, 2023 · secondary mirror collimator screw head - posted in Reflectors: Help. Reflecting telescopes use two mirrors, a large primary mirror and an angled secondary mirror. how I "shimmy" the primary mirror - This post is probably best suited for someone who has or did use to have a skyliner 200P (dob) There are three screws for a phillips screwdriver and 6 holes three of the holes are smaller than the other three I've tried putting an allan key Aug 21, 2023 · Primary mirror alignment with cap - practicalities - posted in Reflectors: I dont need to tweak the alignment of the secondary or primary mirror of my Skywatcher 200P very often - perhaps two or three times a year. If you've got your scope horizontal this means you want the same space between the edge of the secondary mirror and the wall of your cheshire to both the left and right. Knobs: Black plastic, 13 mm (1/2”) diameter Threads: Stainless steel Notes: We offer knobs with screws having either 30 mm or 35 mm length. You generally only work with two screws - loosen one slight, tighten the other slightly - to make very small adjustments and "walk" the mirror into alignment. It is perfectly aligned under the existing focuser right now. You'll find that may loosen it before you can carefully pull the mirror unit from the tube. However MAKs at least mid to high end models have collimating screws for the primary and secondary. Sep 19, 2021 · The thicker the spider vanes / secondary mirror supports are, the more diffraction you'll have. The Sky-Watcher Dobsonian Telescope 203mm/1200mm (8") have a "paraboloidal" primary mirror to eliminate spherical aberration and a four-arm, secondary- mirror bracket with fine supports (0. For the 6x30 finderscope with spring loading, adjust only the two small screws (Fig. Although the do the job fine they are fiddly and difficult to work with. Use a Cheshire sight tube for collimation. 787 mm: Secondary Mirror to Centre of Primary Mirror where N = no. Sky-Watcher advertising makes a point about the 'ultra-thin' secondary mirror supports used on their Newtonians, and it has to be said that the diffraction impact of the 0. 8mm thick struts of the spider are perfectly aligned and the diffraction induced spikes on bright CNC machined secondary spider made of aluminum (EN AW-6061), black matt anodized, suitable for Skywatcher 200 PDS/Quattro This secondary spider is manufactured on a modern CNC machining center. Take the cell to your local hardware to find bolts to fit the mirror support cell. The 40mm screw length is the most common Oct 12, 2011 · With screws removed, grab hold of the black base of the mirror unit and see whether you can twist it, one way then the other. Order knobs with a screw length sufficient to allow the knobs to clear the secondary housing. Its nigh impossible to get really good collimation and it wont stay Dec 11, 2017 · I find the product pictures confusing. adjust the plane of the secondary mirror. 1 x secondary mirror spider, suitable for Skywatcher 130PDS (inner tube diameter 158mm), black matt anodised. Jan 10, 2015 · The existing focuser is the Skywatcher Dual Speed 10:1. remember to make sure your spiders are tight enough to play like a guitar. I do not remember where I read that this could happen. And, as was said in a previous post (or the thread you linked to), a 3-vane spider will produce three bright, and three less-bright spikes, for a total of six diffraction spikes. No problem! A couple of years earlier still I had bought a kit from Astroboot which moves the primary forward abut 40mm by acting as spacers in Oct 2, 2007 · Collimating a Maksutov Cassagrain - posted in Cats & Casses: Hello everyone, i have seen a number of very informative guides on this forum and elsewhere on the procedure for collimating a SCT. 94 they were from China and took a couple of weeks to arrive but work perfectly. Is there a method to align these? I have a camera attached to the scope if that'll help to be more accurate. Tommohawk. I have an Skywatcher 200p with lots of upgrades, - spider changed - add aluminium spider to remove structural flexture under a heavy focuser, - changed the focuser - changed all screws (from primary / secondary) - painted Jul 3, 2016 · Skywatcher 8" dobsonian collimation - where are the screws? - posted in Reflectors: Question on a Skywatcher 8” dob (solid tube, the “classical”). Three Phillips screws pass through the OTA and thread into the mirror cell and provide a pulling force; three Allen set screws thread into the OTA and press against the back of the mirror cell and thus provide a pushing force. 2. I thought I knew everything I needed to know about collimation and alignment of a Mak-Newt. Jun 13, 2023 · 1 x secondary mirror spider suitable, e. Thank you all for the advice back then and specifically to my fellow Belgians on here, sry for the clouds Secondary mirror seems to be a little off, I wanted to adjust it but I can’t get a grip for the life of it. It fits the secondary mirror adjustment screws but does NOT fit the primary mirror locking screws. My secondary mirror central screw head has stripped, so at the moment I cannot move the mirror up and down the tube. Easier to do this on the floor with the tube lying on a duvet or rug - get somebody to hold the secondary mirror end of the tube. I replaced mine on my 10"/F5 GSO dob ~ 20 years ago. Those three screws you put into the secondary mirror Quality Mirror It features paraboloidal primary mirrors made of Low-Expansion Borosilicate Glass resulting in substantially shorter cooling-down times. I also didnt completely understand how things worked. It has the similar paint job as the DS Pro Models Metallic Black with a Gold Skywatcher logo - Quality. This in itself raises questions. 00mm pitch. Some telescopes will have the secondary offset on its holder in which case the centre of the vanes should be centred to the tube while other manufacturers will opt for the vanes centre Jun 13, 2023 · 1 x secondary mirror spider suitable, e. The Phillips head screws are for locking the mirror cell after collimation. I think dropping a hex key into the telescope is just a question of time . If I fix collimation, it looks out in the other direction again. full turns ACW from where supplied visual back & 2” diagonal come to focus (more back-focus => smaller separation => bigger focal length) May 8, 2014 · Hi guys hope all is well, I recently purchased a cheshire premium eyepiece (FLO) and well I can't seem to figure out. I get what looks like perfect collimation when inward defocused on a star, but when I outward defocus, it looks out. The accuracy of the collimation decreases. . The Secondary mirror is larger in size with an extra 6mm compared to the old 8" reflectors I had, which the secondaries have been around 52mm in size. Also, the different pictures seem to show a second finder bracket, but it is different in different pictures. Nov 22, 2014 · Replacement secondary mirror Skywatcher 200p. I purchased this telescope from Woodland Hills Camera and Telescope. Aug 12, 2021 · I have a skywatcher 150pds Newtonian. Locate the eyepiece. The secondary mirror is adjusted with 3 Allen key bolts (Allen key not supplied), I adjusted this so that the whole primary mirror was visible and then adjusted the primary mirror thumb screws until the shadow of the secondary was in the centre. The original secondary mirror holder on the 130p comes with three vanes, which causes six diffraction spikes on bright stars. S. ) That would move the reflection of the primary mirror along the long axis of the secondary mirror. 5 +- Nx0. Thеir collimation knobs arе dеsignеd to rеplacе thе standard scrеws on a tеlеscopе's primary and sеcondary mirrors, making it еasiеr to adjust thе optics without thе nееd for tools. As I think is normal, there are three secondary mirror adjusters with allen key heads in the center of the spider, and a phillips-head screw right in the middle of yhe who Fits: SkyWatcher Quattro 250 Newtonian telescope secondary Knobs: Black plastic, 13 mm (1/2”) diameter Threads: Stainless steel Notes: Order knobs with a screw length (40 or 45mm) sufficient for the knobs to clear the secondary housing and still allow the dust cover to fit without contacting the knobs. The 'scope was perfectly aligned out of the box, but should you ever need to adjust the secondary They did put 3 screws on top there to adjust the secondary mirror so I think they intended for the user to adjust it as needed. But to businessI am putting together a set of Kendrick dew heaters for my SkyWatcher 8 Newt. Nov 20, 2020 · Skywatcher 130 PDS - posted in Beginners Forum (No Astrophotography): Hi all in august / september you helped me with choosing my first Telescope: the Skywatcher Explorer 130PDS. But. I Aug 17, 2012 · How to remove Skywatcher 200 primary mirror cell - posted in Reflectors: Hi guys, I’ve been using my new skywatcher 200/1000 Black Diamond reflector for over a month for a great number of observations. Dec 28, 2022 · Adjust centre screw (and also loosen/tighten collimation screws to match) to get secondary centred under focuser. Are there replacements to be bought? If so are there better ones to choose from rather than hex? May 6, 2020 · In early November 2019 I ordered, from a popular European supplier, an expensive Hubble Optics 1/10 lambda 70mm secondary mirror, to replace the OEM one on my SW300p 12” newt. Sky-Watcher - The worlds see the back of the primary mirror and 2 sets of screws around it. 8mm thick struts of the spider are perfectly aligned and the diffraction induced spikes on bright Oct 23, 2023 · The main screw usually serves two functions. Wanted to know if anyone had any recommendations on 3 things for my dob: 1) Primary spring upgrades? Are they worth it as a cheap upgrade? Any suggestions? 2) Secondary mirror adjustment screws. Jun 26, 2012 · HiI have a SkyWatcher 200p Dobsonian which is a great scope. I then thought it would be worth replacing the primary mirror screws (lock screw and adjustment) with Bob’s knobs (once again, one at a time). This step is necessary only once, you can remove the cover of the primary mirror afterwards. Then lift the tube off leaving the mirror cell on the floor is the easiest way to remove it. (Shame on Skywatcher. Next, you need to adjust the tilt of the secondary mirror so that the entire reflection of the primary mirror is visible in the secondary mirror. It comes with an impressive 0. Apr 9, 2012 · The screw used is M4 (4 mm metric) for the secondary collimation adjustment. The rocker base. By Tommohawk November 22, 2014 in Discussions - Scopes / Whole setups. Jul 20, 2020 · If you can get the coloured paper as she describes, it does make things look clearer. Jan 10, 2017 · I discovered that there are what look like grub screws at the bottom with tiny allen heads. If they aren't shifting, you may need to very slightly loosen the centre screw - again, you need to firmly hold the secondary holder - and rotate the mirror very slightly. 2 inch) refractor. I just purchased a second hand Skywatcher 200-something, and after putzing around with a bunch of stuff the last few days, I went to collimate it tonight and saw that the secondary mirror locking screw (I believe) has a stripped head. I’ve just used my hand air blower to clean the secondary with very good results and would like to do the . I turned a new screw that was about 7 mm longer than the original screw. After I have collimated the primary mirror I always tighten the locking screws afterwards. i) Aligning the Secondary Mirror Dec 21, 2024 · Bob's Knobs for Skywatcher secondary - posted in Reflectors: Hello everyone Just posting this to save someone else the trouble and time that I had. Jun 9, 2017 · secondary mirror, spider vane - posted in ATM, Optics and DIY Forum: Last year I obtained a 8 dobsonian, Skywatcher. Its a purely mechanical problem. May 8, 2014 · My 150P came with a set of tools, like yours I guess, and I almost burst myself trying to figure out why the Allen (repeat Allen!) key wouldn't 'bite'. 3 x M4x25 studs (with cone head) for collimation. Aug 11, 2017 · Problem so far is that one of the screws on the secondary mirror has been threaded so i am unable to get the hex to grip. The high precision manufacturing ensures that the 1. I just replace them today with thumb screws. Then more gently clamp the laser in the focuser and then rotate the laser in the focuser. Secondary Adjustment Knobs. I am fed up to the back teeth of the dreadful four screw adjustment fitted to my SkyWatcher. Not sure what length you will need and my old 10" scope lives at my brothers house 300km away, so I can't check. - posted in Reflectors: I never noticed this before, but my secondary mirror will not center underneath the focuser draw tube. To reach the center I need to move the mirror with my hand. The secondary adjustment screws (2) that can skew the secondary mirror are not called the 'forbidden Unscrew the secondary mirror with the secondary mirror spider from your Newtonian. The explanation I received, which makes sense to me, is Hello everybody! I recently purchased a Skywatcher Flextube 300p, and I'm having trouble getting the secondary in the right position relative to the… Dec 4, 2024 · The other two knobs skew the secondary mirror right or left. My question is do you need to tighten the locking screws or not? If not is there any danger of the mirror moving or falling in the tube!!Will I da The easiest method to align the secondary mirror is with either a collimation cap or a sight tube. Keep the tube horizontal, so you don't drop anything down and damage the primary. Posted November 22 Sep 3, 2013 · On closer inspection the secondary mirror holder is way off centre (by about 1cm); the single arm holding it is way off perpendicular to the ring it screws into (don't know the proper name for this bit I'm afraid!). Fig. Loosen the eyepiece lock screws and slide the eyepiece into the holder. The instructions for assembly were great, the so called instructions on collimation were sparse, adjust by turning the knobs was basically all I got for the secondary mirror. d should be how the telescope is stored when not in use. Apr 27, 2022 · Simple Secondary Mirror Improvement - posted in Reflectors: Hi folks, I want to show you a nice trick, learned from a good friend which improved a LOT my collimation process. Skywatcher 200/1000PDS Sep 26, 2018 · Skywatcher 300p (12") secondary removal, and tale of stupidity. Do the screws on the back have the same purpose? Feb 17, 2017 · Page 2 of 3 - Aligning Secondary Mirror and Focuser - posted in Reflectors: Greetings all. Jun 17, 2024 · 1 x secondary mirror spider suitable for e. Jul 28, 2021 · Page 1 of 2 - Secondary Mirror Offset (Collimation Problems :)) - posted in Reflectors: Hi, Im trying to align the secondary mirror of my brand new Skywatcher 8 inch Dobsonian (I havent reached the stage yet where Im supposed to adjust the primary mirror ). 6 reflector - apart from one aspect. We offer knobs for the SkyWatcher Newtonian on Dobsonian mount primary with factory collimation screws only, and for the SkyWatcher Newtonian on Dobsonian mount secondary (all types). Skywatcher 250PDS / Quattro (tube inner diameter 286mm), matt black anodised 4 x fastening screws M5x6 (for fastening in the tube) 3 x stainless steel studs M4x25 (with tip) for collimation We offer knobs with screws having either 30 mm or 35 mm length. Its a pig to collimate. Recommended Posts. I use the laser to align my secondary and a collimation cap or Cheshire to align the primary (or sometimes the Barlowed Laser Technique). Two nuts with nylon washers position the holder laterally. Jul 6, 2021 · I have just acquired a second hand skywatcher 1309 EQ2 scope and decided to check collimation, not because there is a problem, but because I thought I should know how its done. The position of the secondary mirror, its centering in the tube, is controlled by the spider vanes that hold it in place. I have been able to collimate the secondary mirror nicely (can see all three primary mirror clips at the edges just like in the picture). if you over tighten them they will bite into the aluminium secondary holder and create small pits. d Primary mirror clip Ignore the reflected image for now Fig. Do not over-tighten the screws. Matching screws are included in the delivery. In addition, the secondary mirror can twist during collimation. I can hold the mirror in the correct position, but when I tighten the centre screw it messes up the alignment. Mar 27, 2022 · Setting up a Skywatcher 200PDS and concerned about secondary mirror position under focus tube (see image). The screws fit all Newtonian telescopes from GSO, TS-Optics or Skywatcher and all telescopes where the View and Download SKY-WATCHER NEWTONIAN manual online. With a four screw adjustment, each screw is centered between the spider vanes, making collimation adjustments a snap. Jul 14, 2020 · Secondary Central Bolt - posted in Reflectors: Hi: I have a Skywatcher 12 foldable / Flextube. May 2, 2023 · The machine screws on the secondary holder are M4 x . Three adjustment grub screws bite into aluminium mirror holder and the indentations created make it difficult to adjust things: 1 x Secondary Spider, suitable for Skywatcher 250 PDS/Quattro (tube inner diameter 286mm), black matt anodized; 4 x mounting screws M5x6 (for mounting in the tube) 3 x stainless steel studs screws M4x25 (with tip) for adjustmet; 3 x stud screws M4x25 (with cone head) for adjustmet Feb 6, 2022 · Page 1 of 2 - Collimation secondary mirror - posted in Reflectors: Can you adjust the secondary mirror with an out-of-focus star? I know you can adjust the primary mirror by looking if the black hole is centered in the star. What I did not like: Vignetting - 58mm secondary is too small and cuts aperture even in the middle of FOV. Its nigh impossible to get really good collimation and it wont stay 10000+ "secondary mirror holder" printable 3D Models. The primary mirror is adjusted by the three adjusting screws at the back of your scope. Remove the secondary mirror with the holder from the secondary mirror spider. Apеrtura is wеll-known for providing affordablе and usеr-friеndly astronomy еquipmеnt, including a variеty of collimation tools and accеssoriеs. 8% by diameter or 7. I ordered it in early November to ensure its arrival in time for my Christmas visit to Ireland. thumb screw with holes drilled to accept M4 screw) on it. U sing th eR dDo Fin r The Red Dot Finder is a zero magnification pointing tool that Jul 31, 2023 · The Backyard Universe Secondary Mirror Spider for Sky-Watcher 150mm Newtonian Telescope is an excellent addition to my Skywatcher 150 Apo Astrograph, complimenting the 150mm Backyard Universe carbon fibre tube, as I use the telescope, mount and tripod with battery pack as a mobile device I have already noticed the lack of requirement to constantly colimate, which makes this purchase essential. Since the first time It has very difficult for me to adjust the second mirror with the three screws. About 2 years ago, after purchasing the ASA 2korr reducer, I realised I didnt have enough backfocus on my 12 Skywatcher 300p. The screw in the centre is so tight Jul 12, 2024 · A replacement secondary mirror spider for the SkyWatcher Starquest 130p. The secondary tilts via 3 collimation screws on the top of the scope (center of spider) and turns on the center holding screw. Through sight tube it seems the secondary is too close to the primary (needs to move left in the image), however the central screw for the secondary mirror holder is tightened all the way in May 20, 2017 · The secondary mirror should be the first mirror to adjust. Every Day new 3D Models from all over the World. Feb 17, 2017 · Page 1 of 3 - Aligning Secondary Mirror and Focuser - posted in Reflectors: Greetings all. Ive seen three different ways to remove the secondary mirror for cleaning: remove the collimation adjustment screws, remove the center screw, or remove For the 5x24 finderscope, use the three alignment screws to centre the finderscope crosshairs on the object (Fig. Moves Mar 27, 2012 · The Skywatcher 130P has a decent holder with adjustment screws for tilt - The Astromaster has horrible over long screws with no adequate secondary mirror support. Due to the position that the secondary is attached to the support, the offset is then set correctly. 5mm thick spider vanes is minimal. It's because the supplied key is the wrong size. To extend the telescope tube, loosen the two slider Jan 31, 2010 · There are thumbscrews on the primary for collimation and for the Mirror locking screws. Knobs for SkyWatcher Secondary Fits: SkyWatcher (5”, 8”, 10”, 12”) Newtonian telescopes. Screw the Artesky front ring with the secondary mirror spider to your Newtonian. Collimation. Make sure that the screws are relatively tight so the mirror is held firmly, but not overtightened so they won't "dig" into the aluminium holder. Op they can be finicky and take a little work to get exact but you should be able to get it aligned with some patience and practice. 1 x Secondary Spider, suitable for Skywatcher 200 PDS/Quattro (tube inner diameter 233mm), black matt anodized; 4 x mounting screws M5x6 (for mounting in the tube) 3 x stainless steel studs screws M4x25 (with tip) for adjustmet; 3 x stud screws M4x25 (with cone head) for adjustmet Feb 11, 2022 · This technique does align the primary well. The screws fit all Newtonian telescopes from GSO, TS-Optics or Skywatcher and all telescopes where the Apr 13, 2022 · Page 1 of 2 - Adjustable secondary mirror mount based on Kelvin Clamp - posted in ATM, Optics and DIY Forum: Has anyone designed a DIY adjustable secondary mirror mount for a Newtonian or SC scope based on a Kelvin or Maxwell clamp. b Primary mirror Support for secondary mirror Secondary mirror Focuser Fig. The screws just push on the plate to move the mirror. I have in the past collimated the scope and have always notice that the secondary mirror should come up a bit away for the primary, but the truth was that the central volt wouldnt move no more because it as reached the limit even when all 3 tilt screws are unscrewed (the problem is there is no space Oct 24, 2019 · Page 2 of 2 - Secondary offset on a "fast" newtonian - how much? - posted in Reflectors: TS writes: By doing this, you place the secondary mirror in the optimal position to the focuser to millimetre accuracy. d). 4 x fastening screws M5x6 (for fastening in the tube) 3 x stainless steel studs M4x25 (with tip) for collimation. IF the mechanicals were precisely known (to better Sep 26, 2020 · I ordered the kendrick 2029-M secondary heater as its dimensions seemed like a good fit. be careful not to touch the secondary mirror. g. It's a pain to collimate the secondary with the factory allen head screws. Slightly tighten the screws to hold the eyepiece in place. Stand the OTA upright on the mirror collar and take the 6 cross heads out. Apr 13, 2022 · Page 1 of 2 - Adjustable secondary mirror mount based on Kelvin Clamp - posted in ATM, Optics and DIY Forum: Has anyone designed a DIY adjustable secondary mirror mount for a Newtonian or SC scope based on a Kelvin or Maxwell clamp. the top the small oval secondary mirror held in a support and and the three smaller screws 1 x Secondary Spider, suitable for Skywatcher 250 PDS/Quattro (tube inner diameter 286mm), black matt anodized; 4 x mounting screws M5x6 (for mounting in the tube) 3 x stainless steel studs screws M4x25 (with tip) for adjustmet; 3 x stud screws M4x25 (with cone head) for adjustmet Sep 17, 2020 · Cleaning a 10" GSO Newtonian, secondary mirror - posted in Reflectors: Ive seen many videos on removing and cleaning the primary mirror for a Newtonian, the procedure is very clear. 25"/2" Dual-Speed 10:1 ratio focuser for enhanced focus control and a shorter tube length with the secondary mirror positioned closer to the primary mirror for more convenient prime-focus photography. ) Were you using a collimating tool? 4. A bit later than hoped for the Mars opposition, but not less welcome, it has finally arrived yesterday evening. 3. Pyrex primary mirror. for Skywatcher 200PDS (inner tube diameter 233mm), matt black anodised 4 x fastening screws M5x6 (for fastening in the tube) 3 x stainless steel studs M4x25 (with tip) for collimation A replacement secondary mirror spider for the SkyWatcher Starquest 130p. for Skywatcher 200PDS (inner tube diameter 233mm), matt black anodised 4 x fastening screws M5x6 (for fastening in the tube) 3 x stainless steel studs M4x25 (with tip) for collimation Unscrew the secondary mirror with the secondary mirror spider from your Newtonian. Knobs with 30 mm screws are the most common in this configuration. Oct 10, 2013 · There are few things that didn't impress me when I had a closer look at my new telescope (Skywatcher 150p). 7mm pitch and the screws on the primary collimation bolts are M7 x 1. Sky Watcher Newtonians comes with little grub screws to adjust the secondary mirror. I was surprised, as Skywatcher have supplied tools for almost everything else which may need adjusting, but no allen key for the collimation screws. The last two nights have been particularly dusty and would like to clean the optics. Fine tune to perfection using a Cheshire sight tube. 1 x Secondary Spider, suitable for Skywatcher 150 P/PDS/Quattro (tube inner diameter 180mm), black matt anodized; 4 x mounting screws M5x6 (for mounting in the tube) 3 x stainless steel studs screws M4x25 (with tip) for adjustmet; 3 x stud screws M4x25 (with cone head) for adjustmet For practical reasons we would like to mention that it might be useful, especially for the smaller Skywatcher models (150PDS/Quattro, 130PDS), to mount the secondary mirror on the new secondary spider first, before mounting the new secondary spider in the tube! Mar 16, 2012 · Now I took the opportunity to replace the secondary mirror holder center screw to prevent the secondary mirror to be able to come off in the event of too much adjustment on the three collimating screws. Fortunately it did not appear that The award-winning Sky-Watcher EXPLORER-130 (NEQ2) is a fantastic choice for the serious beginner and also receives high marks from more seasoned astronomers. Nov 9, 2011 · " Note: Some scopes require the secondary mirror to be offset from the centre of the tube. 2% by surface area. directly back up the tube to the secondary mirror which directs Oct 14, 2020 · My SkyWatcher 190 MN - Maksutov - Newtonian - posted in Cats & Casses: My journey with this telescope began about 3 years ago. Aug 21, 2013 · The new Sky-Watcher Explorer-150P DS has the same superb parabolic primary mirror as the Explorer-150P but features a 1. Jan 8, 2006 · Please help with secondary mirror heater - posted in Reflectors: Hi all:Ive also posted this in the Equipment forumHi gang:Been a long time since Ive been around Cloudy Nightsbroken ankle, family matters, whatnot. Accessories in the Box: 5. I tried my best to grasp the diagonal to keep the vanes from twisting, but to no avail. Posted May 21, 2023. I have not been able to find a description of this anywhere. 5 mm Ultra-Thin Secondary Mirror Support and light gathering power improves greatly. The thing is, I bought it used, and noticed right now that the mirror doesn't have the 3 screws, just the big one in the middle. Align the Jul 7, 2020 · Page 1 of 2 - SkyWatcher SkyMax 180 disassembly - posted in Cats & Casses: Ive been struggling with collimation on this darn thing for as long as Ive owned it. b) 4. B. E. (on the primary mirror) and thread screws on the secondary mirror. I was unsure of what length of screw to get for my Skywatcher 300p. To intercept the light cone properly, the secondary mirror has to be positioned “offset” Jan 7, 2016 · My issue is this: reading the instructions that came with the telescope and looking at numerous articles and videos online re collimation, all state that the adjustment of the secondary mirror is achieved by adjusting the three hex-headed screws at the back of the mirror holder and using the large cross-headed screw to move the mirror position The three small screws should be adjusted untill the secondary mirror edge (2) is concentric with the primary mirror edge reflection (3). Light bounces off the larger primary mirror and onto the smaller secondary mirror, which directs the light towards an eyepiece or camera sensor, where it forms an image. Nov 12, 2017 · Okay, I replaced all the Allen screws on the secondary mirror holder with Bob’s Knobs (one at a time as instructed) and I thought I’d aligned the secondary mirror. If your SkyWatcher primary is already equipped with factory knobs, our primary knobs will not fit. It is certainly not without its flaws, as the secondary mirror collimation screws have too much play. Mount noise is quite annoying, especially at high speed slewing. With my Sky-Watcher 200P I find a collimation cap is the better solution as a sight tube or my Cheshire do not allow me to see the very edges of the secondary mirror through them. May 23, 2023 · I just bought the Skywatcher Quattro 200P, but for some reason the secondary mirror will not align with the focuser. Hello! I found out that, for a SkyWatcher Heritage 100, collination is done using the secondary mirror. Thus, the mirror cannot move left in the image in order for me to center it. the silver knobs and screws are the collimation adjusters. Dec 26, 2015 · But it's also important that the mirror is square on to the focuser tube and perfectly round in appearance (despite the secondary being an oval shape tilted at 45 o. Use the three collimation screws located on the top of the secondary mirror holder to center the reflection of the primary mirror underneath the cross hairs of the Collimation Eyepiece. A cap is the right tool for me to align the primary mirror of my f5. "twangg" when you pluck them. Tags Secondary mirror holder with hex head screws Like many Chinese Dobs, the SkyWatcher has a push-pull screw arrangement for the primary mirror cell. One of things that really caused me some grief was the way Skywatcher designed secondary mirror holder. See the photo below. over-tighten the screws. On attempting collimation ive noticed all 3 adjusting screws are rounded offas they are recessed I have no idea how to remove them to replace. The sceondary mirror just dangles on the end of some long screws with little to give it support. I have a slight bend in the spidervane now, and never seem to be able to line up the secondary. The secondary mirror remains on the holder. a Corretly aligned Needs collimation Fig. The three bolts that are missing pass through the springs. Ed has posted a very nice guide for Jun 24, 2024 · Skywatcher 200PDS - distance between spidervane and secondary mirror - posted in Reflectors: Hi I am trying to figure out what the correct distance is on a Skywatcher 200PDS for the distance, which in the enclosed image, for another newtonian is 5mm. Unfortunately, this is simply not true. It might be worth checking the gauge of the secondary thumb screws. The four black lines are the vanes that hold the secondary mirror assembly in the centre of the tube. 8mm thick struts of the spider are perfectly aligned and the diffraction induced spikes on bright Aug 15, 2021 · Is your primary mirror pushed all the way in by the collimation screws / knobs or is it at about half way of the travel? If it is all the way in, there are two potential downsides: 1) the primary mirror touches the bottom of the 3 clips - which can cause astigmatism, 2) not all the primary mirror is reflected by the secondary mirror - which is what you described. Once you have access to the screws and they rotate freely, unscrew them a little, to allow further adjustment of the secondary, ensuring that the mirror is concentric to the inside of the focuser tube assembly (follow one of the regular guides ). Unfortunately the cheap lasers do not illuminate the primary mirror marker very well and it makes a very fuzzy image of the mirror marker. Ive removed the three set screws and turned the screw clockwise until the secondary Mar 13, 2024 · The Sky-Watcher 200P (with EQ5 mount) is a quality telescope to capture affordable, quality views of the universe. What can I do to prevent condensation forming on both mirrors and the finder scope? Thanks. e Primary mirror clip Primary mirror clip Primary mirror clip Oct 7, 2022 · Solutions for Condensation (Dew) on the Secondary Mirror - posted in Beginners Forum (No Astrophotography): I have a Skywatcher Flextube 250p and last night I had a problem with condensation (dew) on the secondary mirror. The secondary mirror vanes are held in place and adjusted by 4 thumb screws. Red – the three primary mirror clips. If there is a burr on the screw, it carves into the aluminium secondary mirror holder. The rocker assembly composed of D1 and D2 left and right side, D3 reinforcement bar, D4 14pcs M6x25mm Allen screws and D5 grease pot. Jul 14, 2016 · The screws for the primary cell are the 6 black cross heads. May 27, 2020 · E. What this means is that the Sky-Watcher Starlux 190MN has the same light gathering power of a 183mm (7. I lined it up with the factory center Make sure that all three small alignment screws are tightened to secure the secondary mirror in place. Cheers Sep 2, 2009 · Crisp mirrors and the ease of set-up and transport for scopes the size of the Skywatcher Collapsible 12” Dobsonian and the Orion XX12 are a sign that yet another “Dobsonian Revolution” is underway. For the secondary mirror, however, there is less consensus. Part: CNsec30 or CNsec35 Fits: SkyWatcher (5”, 6”, 8”, 10”, 12”, 14”, 16”) Newtonian telescopes. One seems to show the secondary mirror with hand-operable knob-type collimation screws (good), while another shows clearly inset Phillips screw heads (bad). A precise adjustment becomes impossible. CNC machined secondary spider made of aluminum (EN AW-6061), black matt anodized, suitable for Skywatcher 250 PDS/Quattro This secondary spider is manufactured on a modern CNC machining center. This will cause the mirror to turn every time you touch those screws. Is it a problem? Can collimation still be achieved? Thanks! P. c). Jun 26, 2018 · The central obstruction from the secondary mirror and mirror assembly is 51mm in diameter. One with cross hairs, even better. This one has four vanes to give the classic four diffraction spikes. That’s 26. You don't need to take them out. Mar 14, 2021 · Sky Watcher - 8 inch Dobsonian - cannot lock/unlock the primary mirror's hex screw for collimation - posted in Beginners Forum (No Astrophotography): Howdy yall - Im having a hard time completing the collimation of my telescope. When I tighten the screw in the middle, It cannot go any further. The secondary mirror is held securely yet safely against the front lip of the aluminum bezel with rigid foam and polyester batting. Aug 15, 2021 · I'd like to change the 3 collimation screws on the secondary mirror on my 8" Skywatcher dobson. Feb 26, 2021 · Center the secondary in both the tube -using the spider vanes- and the focuser -using the adjusting screws on the secondary support-. C. Switching them to thumb screws makes adjusting the secondary much easier. Mirror cell and spider assembly design. To figure out the length of **** need just measure the thickness of the Sep 9, 2022 · Knobs for Sky-Watcher Newtonian Secondary. 1 x Secondary Spider, suitable for Skywatcher 130PDS (tube inner diameter 158mm), black matt anodized 4 x mounting screws M5x6 (for mounting in the tube) 3 x stainless steel studs screws M4x25 (with tip) for adjustmet 3 x stud screws M4x25 (with cone head) for adjustmet 1 x stainless steel fixing screw M5x25 for mounting the secondary mirror holder Apr 22, 2010 · The only tool I had was an eyepiece cap with a hole in the middle. I have never collimated it before but obviously there's a first time for everything. The secondary mirror of the Quatto 200 is already positioned “full offset”. 8mm thick struts of the spider are perfectly aligned and the diffraction induced spikes on bright If there is a burr on the screw, it carves into the aluminium secondary mirror holder. D. Jan 23, 2010 · 8 Skywatcher secondary mirror problem. Dec 30, 2024 · 1 x Secondary Spider, suitable for GSO/StellaLyra/TS 8" Newtonian, black matt anodised; 3 x stud screws M4x25 (with cone head) for adjustment; 1 x stainless steel fixing screw M6x35 for mounting the secondary mirror holder; Customer reviews CNC machined secondary spider made of aluminum (EN AW-6061), black matt anodized, suitable for Skywatcher 200 PDS/Quattro This secondary spider is manufactured on a modern CNC machining center. For Apertura and Orion Oct 3, 2020 · 2) Centre the laser on the mirror using the secondary screws/knobs (this gets you close). The other two knobs provide a non-perpendicular adjustment, similar to the other two screws in a conventional secondary mirror 3-screw hub. - posted in Reflectors: Hi folks, So, firstly, Im an idiot. Use the secondary screws/knobs to get the laser to trace a circle where the centre of the laser traced circle is the centre of the mirror marker. Oct 27, 2020 · I purchased some 5 x 25mm thumb screws for the primary mirror from ebay for £2. The primary mirrors is fairly easy to collimate and it holds collimation well. I have a 12 Skywatcher (Flextube 300p). Ive heard some people disassembling their Mak right Mar 14, 2006 · And after reading(on here)how axial collimation can be facilitated, but can get you way off track with mechanically coincident collimation, I would say that one would have to be very careful not to play too fast and free with these screws. Im looking for advice on how to align the secondary mirror and the focuser on my 8 Skywatcher Dob. Did anyone have to move their secondary mirror up or down the tube after changing your focuser? Apr 10, 2015 · Secondary center screw won't budge. Does Celestron loctite these? That would seem silly as it is an adjustment point. These aren't cut perfectly evenly but hopefully the 1mm overhang isnt going to be a big May 21, 2023 · 1 yr watchoutforthatduck changed the title to Skywatcher 130 collimation; Peter Drew. 1 x stainless steel fastening screw M5x25 for fastening the secondary Feb 8, 2019 · Page 1 of 2 - Better mirrors/coating on Skywatcher vs Apertura vs Orion Dobsonian? - posted in Reflectors: In comparing these Im leaning toward the Apertura but I noticed this on the Skywatcher page for their vanilla Classic dobsonian: Both primary and secondary mirrors deliver 94% reflectivity, using borosilicate mirrors coated with quartz, titanium and silicon dioxide. - posted in Reflectors: While attempting my first ever collimation today on a new Celestron xlt150, I found the secondary center screw incredibly tight. I had a previous post (I think in the beginners forum) complaining the collimation is sticky in that moving the collimation screws doesn’t necessarily result in movement of the mirror. c) 5. e. Adjust the secondary mirror up and down the tube. ) May 29, 2024 · Updates on my skywatcher 12" dob - posted in Beginners Forum (No Astrophotography): Hey all. The three locking screws beside them serve to hold the mirror in place after collimation. However, the 12 , 14 , and 16 sometimes require knobs with 35 mm screw length. Can you get aftermarket ones to adjust with your fingers by turning instead of using the provided hex screws Jan 18, 2014 · btw. In a fast Newtonian like the Quattro, the center of the secondary mirror doesn’t correspond to the axis of the cone of light reflected by the primary mirror. I am using a well collimated laser but I cannot adjust the secondary mirror at all. May 3, 2020 · Secondary mirror problem - posted in Reflectors: Hello everyone. The collimating of a SCT involves only moving the secondary mirror. Central dark grey circle with four black lines – this is the secondary mirror reflected in the primary. If the springs are missing you have to find three that will apply tension to the cell. The heater is almost a perfect fit for the 8" Quattro secondary mirror but it ended up extending outside the secondary by about 1mm on the edge with the wire connection. Make sure it's centered i May 21, 2019 · Secondary mirror collimation hex screws rounded - posted in Beginners Forum (No Astrophotography): Own a used 150mm skywatcher dob. The secondary (flat) mirror (with cover), the focuser, finder base and light shield on the secondary assembly. 6x top and 6x bottom separable truss tubes, with number markings. Just extend the tube, use the finderscope and point the telescope towards your favourite night sky objects – sit back and enjoy the great light gathering of the Sky-Watcher Dobsonian! To top it off, the Sky-Watcher Collapsible Dobsonians are equipped with a 2″ Crayford focuser and focuser locking screw. CNC machined secondary spider made of aluminum (EN AW-6061), black matt anodized, suitable for Skywatcher 150 P/PDS/Quattro This secondary spider is manufactured on a modern CNC machining center. I’m not sure if the screws came in threaded or I’m doing something wrong, I’m trying to use the hex key that came with it but no success so far. ) After reassembly and collimation I am getting split diffraction spikes that I assume are due to missalignment of the secondary mirror supporting vanes. Also be careful with those skywatcher secondary screws. 5mm thick), to reduce diffraction spikes and light loss. If you loosen the central adjuster screw on the secondary, the secondary will move down the tube towards the primary. The secondary mirror is aligned by adjusting the three smaller screws surrounding the central bolt. The thing is, it looks like a circle when I look down my Celestron Chesire collimation tool and Ive managed to use the tiny hex screws Jun 8, 2016 · The primary mirror on this OTA has screws for adjusting the primary mirror with each screw paired with a parallel locking hex nut located right next to it along the primary mirror mount rim. Probably because I am only transporting it from an outhouse to my garden. zoc oqurc jsyqpzw gybas iyvc mtzw hoin sbj dnwzs bmym