I'm trying to decide what the optimal pixel size for the RASA 11 would be. The smallest pixel size I can find is the 2.4 um ZWO ASI183MM or similar sensor. However the spot size for the instrument is 4-4.5 um so I wondered if this will have a bearing negating the smaller pixel size or is that more about the spread of the light which would span 2 pixels (under ideal conditions) for this camera. I think it would be quite rare to realiase the true potential of the RASA under my poor skies but one can always hope. The math says about 0.8 arc secs per pixel at 620 mm focal length on a 1x1 bin.
It might even be worth binning the ASI183 to 2x2 to get 1.6 arc secs per pixel.
I could carry on with the ASI6200 with its 3.7 or so sensor pixel size however that mostly lives on the C14 and removing the camera to go to the RASA normally means a new set of flats need to be created when it is put back on the C14.
I've ordered the ZWO ASI183MM pro for the RASA to have a play around however the jury is out as to what would be the optimal sensor pixel size- let me know your thoughts.
I think I will get a good field with a smaller sensor- I crop most targets when I use the ASI6200 on the RASA so I don't think it will be too much of an impediment- I can always switch back to the ASI6200 for wider field targets.
Let me know your thoughts-please.
Edited by pyrasanth, 13 April 2021 - 05:26 PM.