bluetsunami wrote:
Here is the 50/1.7 with a set of Fotodiox tubes. Pleasantly surprised at its performance this close...
There is definitely a loss of contrast at and beyond MFD but it gracefully takes a tone curve adjust to bring it back. Sharpness is still very much there at f/2.8 and beyond. At f/1.7 to f/2 there's the spherical aberration but its definitely not bad when used in conjunction with the thin DoF at such apertures. It can very pretty and abstract.
Looks good (except I don't like the bokeh in #1). Much better than the diverse shots taken with the lens reversed that someone posted; those showed a lot of yellow/blue CA outside the centre and unimpressive sharpness.