Test image to check out the image scale of a new optical setup. This is unguided and poorly focused. Approximately 5 minutes of luminance and 2 each of R, G, B, all in unguided 30-second subs. 0.83 arc seconds per pixel, via a C9.25 SCT with 0.68x focal reducer, to an SXV-H9.

M51 Unguided