Just have a question around PHD2 guiding RMS. If I use:
https://astronomy.tools/calculators/ccd
And put in the values for my setup (ASI533 and 1000mm FL) I end up with 0.77" per pixel.
Does this mean that I need to be ideally seeing PHD2 guiding RMS total of around 0.4"? My values are normally double or sometimes triple that. My stars are pretty round for the most part.