Meade 12 LX200 (Not ACF) Backfocus for PF AP?
Posted 02 February 2013 - 11:36 AM
I have a 2006-ish vintage Meade 12 OTA (not an ACF scope) that I regularly enjoy using for planetary fun. I recently picked up a T4i that has found itself on my old Vixen ED80sf for a night of giggles with M41/42, and I'm looking to try it mated up to the big Meade for fun.
I'll be toying around in the wonderful world of coma and F10 as I don't currently have an F6.3 reducer/corrector for the scope.
So, my question is, what would be the ideal backfocus distance between the rear end of the OTA and the camera sensor that I should shoot for?
Any guidance is much appreciated.
Posted 02 February 2013 - 11:51 AM
Posted 02 February 2013 - 12:16 PM
So, I just need to know what that distance is, or alternatively, how long the standard Meade adapter is.
And, yeah, I know, dealing with 3000+ mm of focal length is probably going to cross the border into ridiculous, but this is just for fun and curiosity. If all I manage to do this evening is come up with a few train-wreck subs before slewing to Jupiter and pulling out my DBK21, that's all good.
Posted 02 February 2013 - 12:46 PM
Posted 03 February 2013 - 11:56 AM
"The Core" with an non-modded T4i at ISO800, 100 X 30 Sec...
Posted 05 February 2013 - 02:52 PM
On a side note, just received shipping notification on my reducer/corrector from Astronomics, and it should be in my hot little hands by this weekend. Might have to roll out the big gun again if the weather cooperates.