|
I have been looking this over myself a lot recently.
Roland Christen suggests 1 arc sec/pixel is a good guide for average seeing astrophotographers.
However I have had good results using a Trius 694 (4.54micron pixels) at 2 metres and that is .45 arc sec/pixel. It gives noticeably better resolution than a 9 micron CCD on galaxies.
With the KAF8300 and the 3 high QE Sony CCDs (ICX694 6.3 mp,814 9 mp,834 12mp) with super low read noise the equations seem to lean towards the smaller pixels for most applications except perhaps long focal lengths??
1.9 arc secs/pixel I would regard as undersampling by quite a bit. I agree with Rick here and it matches with my experience with CCDs in th elast few years.
But if you routinely get bad seeing then all bets are off.
Greg.
|