Can someone please provide me with the calculated optimum pixel size for a CCD camera imaging through a 10"SCT (fl2500mm) with an f6.3 converter?
Thanks, Allan
From memory the calcs are you want a star image about 4-5 pixels across so it doesn't appear too blocky or too big. At 4 arc seconds seeing, that relates to roughly 1 arc second per pixel.
2500 x 0.63 = 1500mm so 1 arc second over this distance is
1500mm x tan(1/3600) = 7.27 E-3mm so about 7µm.
I'd suggest 4-5µm (web cam) to 10µm would be in the range.
Thanks Al for the calculation. Fits in with what Ive been told and at the moment the QSI583wsg is looking good for both my scopes with1x1 and/or 2x2 binning.
The other option is to download CCDCalc from here for free. http://www.newastro.com/book_new/camera_app.php
It lets you choose all the parameters and displays the field size of your scope camera combination.