Thanks for all the replies. Alright so since there isn't really an AF option for me, what are the best MF options for me? I want something really sharp and compact, and hopefully under $700. So for that price, what do you guys think is the best 35mm lens for my NEX 5?
How about speed? You haven't said what you prefer in terms of lens speed.
As always, there's a bit here that's left to interpretation like the bokeh of each individual lens (which can't be rated, as it's usually a matter of preference) or the color rendering of the lens.
As mentioned, the CZ 35 / f2.8 biogon t is quite sharp, it also has a very soft bokeh. It should be possible to find one within your price range.
f2.8 is adequate for shallow DoF (in my opinion) but it leaves some to be desired if low-light performance is your concern.
Comparatively, there's the voigtlander nokton 35 / f1.4 which is an awful lot faster, fairly sharp (a little low contrast and not as sharp wide open) with fair field curvature. It can make for some impressive vibey results, but is not as clinical as the CZ.
You can also look at some SLR lenses but in terms of size, the adapter will move most of them out of the realm of "small" even if the lens itself is small (an adapter must make up the registration distance, so SLR lenses will
always be longer as they have longer registration distances).
One of the SLR lenses that may fit your bill would be the Konica Hexanon 40mm / f1.8 which with the adapter comes out to be about the size of the kit zoom (SEL1855). I'm not
crazy about the bokeh of the Konica, as it can be a bit busy but it seems to be pretty nice rendering if the bokeh is not offensive to you.
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-mark
http://www.flickr.com/photos/mark_mcd/