Mach1GTO / G11/G2 (stock) / AT6RC / AT10RC / TMB92SS / Astrodon 50D / STT-8300M / FW8G-STT / PixInsight / etc, etc. Astrobin - Flickr
http://www.faintfuzzy.net Stuff C14, C8, Orion XX14i, Meade 8" ACF, AT6RC, AT102ED, Orion ED80, PST, AP1600GTO, CGE, CG5, ST10-XME/CFW8, QHY8PRO, Optec TCF-s, Microtouch Focuser, Pyxis LE, Hyperstar for C8.
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C14 EdgeHD, C11 EdgeHD Zhumell 8" f/6 Newt AP1200GTO, CGEM DX, CG5-ASGT Rob Miller Tri36M tripod Canon Rebel XS, Atik 314L+, DSI pro I,II, QHY5L-II SX 7 FW with Astrodon LRGB, Ha 5nm Hutech OAG5, Rainbow Optics Grating Scorpio Observatory
Quote:Not necessarily. How far off is the collimation under heavy load? I have seen many fantastic images taken with AT6RC scopes. The focal length may be short enough not to notice collimation shifts at prime focus or with focal reducer.You should double check with the manufacturer about their design in AT10RC. I believe AT8RC has same design as AT6RC.Peter
Quote:pfile, are you planning to get the AT10RC scope? That is a much more expensive scope and it also has the focuser connected to primary mirror design flaw. So you may want to take this into consideration before buying. These scopes are very hard to collimate correctly, so I think you should not try to tweak it for different parts of the sky. Apart from wearing out the mechanics of adjustments, it will wear you out also
Quote:Did you adjust the primary already? If so, maybe you should try to tighten the collimation bolts.
Climbing Stars Obs 4.2 Suburban skies
AT10RCF, TMB SV105 F6.2, C11, Obs 15, DS solarmax 40 AP900GTO QSI 683 & 640wsg-8 12' X 15'6" BYO http://www.astrobin.com/users/jaddbd/
- Jared Willson
Quote:I'm away from my computer but I will post an image of the stars in the center of the field with the AT10. i suppose it stands to reason that the primary is now tipped due to the torque of the camera/filters. at this point I'm wondering if I should throw more money at this (focuser) or give up. seems a bit premature to give up since I have yet to adjust anything...
Quote:gah, i think the AT10RC is out of collimation with the load as well. when it was collimated, it did not have the camera package on it and in order to get the STT-8300M on there i had to remove the focuser in order to add another extension ring. the focuser is the stock focuser, which is probably not helping anything.so at this point i guess i have to try collimating, probably with CCDInspector, so i can do it with the camera attached. up for grabs is whether or not i should upgrade the focuser first.do the shapes of the stars mean anything with respect to how the scope is miscollimated? at this point i'm wondering if i can get away with adjusting the secondary only.