AT 8" RC f/8
Canon EOS 300mm f/2.8
Canon 5D mkII HyperCams modded.
Astrophoto: Intes Micro ALTER-M606 (6" f/6 MCT), Astrotech AT6RC (6" f/9 RC), 2x Tair-3 lenses (300mm f/4.5)
Visual: Celestron 8 SCT ('77 Orange Tube, 8" f/10), Selsi #247 Refractor (aka Towa #339, 80mm f/15), Tasco 11TE-5 Newtonian (4.5" f/7.9), Galileoscope (50mm f/10)
Mounts: Celestron CI-700, iOptron ZEQ25GT, Celestron CG5-ASGT, plus a couple old EQ2s My Astrophotography Site: http://ap.x-wing.ca/
That's a good idea to offset the polar alignment and let a long exposure drift in declination to see the PE. I'll upload the results when I get a chance.
Quote:Too bad about not having the dual axis drive... If that 300 f/2.8 is as good or better then the 300L f/4 I have been able to use I would indeed recommend you keep using it, including after you get an Atlas or CGEM! There are quite a few objects much to large to fit in the FOV of the AT6RC so it is very good to have a "wide field astrograph refractor" like that 300mm lens
Quote:That being said though I can think of a way to use the AT6IN on your existing mount - try some planetary photography! There is some software called EOS_movrec that will record the live-view video output of DIGIC III and 4 cameras, you can use that to capture some short video of the Saturn or Jupiter or the Moon and stack the results with RegiStax. Since video is going to be on the order of 1/15th of a second or faster exposures the tracking error will not be a problem at all.I should note that I have not seen anyone use eos_movrec with a 1D MK III yet, but it is DIGIC III based so I would *think* it should work.
Quote:You can get a G11, or maybe even a MACH1GTO for no more cost than your camera and lens. Or maybe that is your camera OR your lens!
Quote:Falcon took some great shots with at 912mm with is CG-5 unguided. His copy must have very low PE. I believe the CG-5 can be guided.
Quote:Are you going to try any long exposures on your Celestron CG-5 ASGT with your AT6RC when the weather clears?