This image was taken with a Nikon D40 through a Celestron C-90 Maksutov- Cassegrain, sharpened a little and colorized to give it a yellow cast.  This view was before 1st contact and just included as a comparison to the full Sun image with my Nikon D600 and 6" f/5 achromat.  The D600 has quite a bit more resolution but the D40 image isn't that much worse.