Quote:
Originally Posted by codemonkey
My main question is what are you looking for in relation to pixel size? Is there a specific ratio that will yield optimal results?
.
|
for anything but a very small scope, suggest that the pixel size in arcsec be 1/2-1/3 the seeing that you expect if you want the optimum DSO combo of sensitivity and resolution.
Quote:
Originally Posted by Atmos
Shooting with a 50mm lens will ALWAYS be lens (and camera architecture) limited where as a 24" F10 will always be seeing limited unless using something like 24 micron pixels.
|
good point but maybe you could take it a little further - a 24" scope will always be seeing limited
even if it has significant aberrations. eg, if a big scope has say 1/2 wave of SA, it's FWHM will blow out by say a factor of ~2x - to 0.5 arcsec. But that will still be way less than typical 1.5-2 arcsec seeing FWHM, so it will not matter (quite a bit worse could be tolerated - which is why scopes with horrendous central obstructions still work OK). Optical quality is a major factor with lenses and small scopes, but it is almost of secondary importance with big ones - unless your seeing is exceptional.