View Single Post
  #11  
Old 17-09-2017, 06:36 PM
Atmos's Avatar
Atmos (Colin)
Ultimate Noob

Atmos is offline
 
Join Date: Aug 2011
Location: Melbourne
Posts: 6,980
There are other complications that do need to be considered. For instance, your telescope may have a corrected imaging circle of 44mm for a FX (36x24mm) sensor but what is its correction like off axis?

My 130mm Sky Rover has a 55mm image circle which is considerably more than a FX sensor but the stars at the corner of a Nikon D810 are not perfect. Good (potentially very good in fact) but not perfect. They would be perfect with a 16200 sensor (APS-H) or a 11002 sensor because the pixels are larger. The D810 (QHY367) has 4.88 micron pixels but how many telescopes have a <5 micron spot size 22mm off axis? Not many.
It is easier to have 9 microns at 26mm off axis than it is to be <5 microns 22mm off axis. So in that respect, a 16803 is easier to correct for than a QHY367 even though the sensor has more real estate.

And Suavi, why bother with a 10" F/3 when you can get a 12" F/3! (Officina Stellare RH300
Reply With Quote