Last night I was doing some reading since the clouds rolled in about sunset. The topics were pixel scale, fov, etc. I came across astronomy tools and entered my info with data calculated from my reading and Sombrero as my subject. No surprise, same result. My calculated FOV was 78 arcminutes if I remember correctly. But my reading suggested that maybe a camera with a smaller sensor would help. I entered the figures for my guiding cam as my main sensor. My FOV was reduced greatly!
For a test, I actually used my Canon vs my ZWO ASI 120mm this morning on a distant target. Sure enough, my Field of view was narrowed by (just guessing) 3X. This would definitely allow me to photograph Sombrero.
I do have a few questions about this.
1) Does using the smaller sensor affect light gathering ability?
2) Am I sacrificing the ability to crop my images in processing. (Losing resolution)
3) My ASI 120MM is not cut out for a main imaging cam. Which smaller sensor astro cam do you guys recommend on a budget?
Thanks in advance!
Edited by rjhat3, 05 April 2020 - 01:57 PM.