Mach1GTO / G11/G2 (stock) / AT6RC / AT10RC / TMB92SS / Astrodon 50D / STT-8300M / FW8G-STT / PixInsight / etc, etc. Astrobin - Flickr
Quote:well, this is interesting: on the AT6, when i attach the tak collimation scope, the donut on the secondary is definitely not centered up. furthermore if i rotate the focuser, the light area around the dot moves as i rotate the focuser, as though it's orbiting a point.i *think* this means that the focuser first needs collimation/tilt adjustment as per John D's instructions above. then perhaps the scope needs collimation.strange as CCDInspector says everything's mostly okay with the reducer/flattener in place. can an FR/FF really cover up a collimation problem?
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/
Quote:that curvature map looks great. nice work.good point about the side screws. i'll check those. i had to remove/replace the top 2 screws to mount a vixen rail on top, but i had done that long before i tried the STT-8300.of course now i have adjusted the primary in the AT6 so yeah, before i take it outside again i'll make sure the collimation lock screws are tight. now i'm not certain that the secondary was so far out of whack due to my problem aligning the tak scope, but at this point that's all behind me - the mirrors have been moved!on the AT10 the secondary collimation screws are pretty tight - i'm not sure i could move them 1/30th of a turn! but i can see that such tiny adjustments are needed once you get close.
Quote:are you using the deep sky instruments method of collimating with the camera attached?
Quote:Quote:are you using the deep sky instruments method of collimating with the camera attached? No, never. I have tried that and it is a major hassle. If done right, and I just did it pre-sale on my 14.5 RCOS last night, it is quicker and just as accurate with a good eyepiece (after doing daytime collimation with a laser and Tak scope). It does not entirely apply to the ATRC scopes but Ken Crawford did a great video on RC collimation that is on the RCOS site.Having said that, I acquired sanity last night after thinking thru this purchase and plan to call Anacortes when they open and cancel the ATRC order and order a Tak TOA 130 instead. Shorter F.L but WAY easier to deal with. I am getting too old for this S***.....
Quote:Having said that, I acquired sanity last night after thinking thru this purchase and plan to call Anacortes when they open and cancel the ATRC order and order a Tak TOA 130 instead. Shorter F.L but WAY easier to deal with. I am getting too old for this S***.....
Quote:Stay tuned to this page for testing results, updates, and modifications to the scope as they progress thru summer of 2103.
Others may disagree. Your millage may vary. Void where prohibited by law.
Quote:Gee, will it take you that long?
Quote:OAG is key, i never had round stars on the AT6 or the AT10RC until i started using an OAG...