I like 'm both. Both have there cons and pro's, 50mm isn't very wide but has no distortion in the corners, the 24mm has distortion but has a very nice wideangle. Depends on what u are shooting i guess.

Enough Light.. that's about it :) Good lens helps a lot. I'm really glad i bought the Nikkor 50mm 1.4. very good lens, and the 24mm 2.0 to. Both are pretty fast and that's crucial for adapters.

Actually, no. I'm using a static adapter, not vibrating. The reason why it is so sharp en detailed is because I'm keeping the adapter very clean (clean it with an air blower every time i use it) and use very good lenses. + you need a large amount of light to get a very clear picture. That day was a very sunny day.

I'm now in the middle of making a music video that has some very low light scenes and vignetting starts showing very noticeably, but it kind of works with those scenes.
Will be done in a few weeks.