Today's moon with a very cheap 500mm lens

Took a picture with my 2nd hand 100-500mm Soligor lens with adapter on a NEX-5. I am new to this kind of photography only took 1 more shot of the moon but that was just with a 135mm.

I have trouble with the sharpness, on my live view screen the moon shows a little more detail. So maybe it is the shutter which give some movement during the exposure? And of course this lens is already a bad lens but have to start with something. Not too bad if i say so myself, nothing like the ones i see on this forum of course.

Used F/8 and iso-400 and shutter priority. I also have some trouble choosing the right amount of sharpening and noise reduction. Here I chose for less noise reduction.

Comments and/or tips are welcome. And i will read more on this forum for tips but if you have some it is much appreciated.