I think those area

Forums Photometry Hyperstar for photometry? I think those area

James Screech

I think those area calculations are a bit out, looks like you did pi * D * D instead of pi * r * r.

However, if the seeing is making stars effectively extended objects surly the gain in magnitude will be related to the change in focal ratio not aperture, and the aperture increase will improve the signal to noise ratio as more photons are collected in total.