This image was taken with a Nikon D600 through a SkyWatcher 150mm f/5 achromat, sharpened a little and cropped to make it bigger.  This view was before 1st contact and just included as a comparison to the full Sun image with my Nikon D40 and Celestron C-90.  The D600 has quite a bit more resolution but the D40 image isn't that much worse.