Love the Voigtländer 58mm F1.4. This portrait shot at F2.8. Processed in Bibble. I think it has a very "analogue" touch to it.

Trying out the Voigtländer Nokton 58mm F1.4 - I love this lens. One shot at F1.4, the other at F2.8. See the difference in DOF.

Quite a bit of CA though. But nothing really serious imo. Camera shot with Nikon P7000 - note the BlueSLR addon.

Shot with Nikon D700 + 70-300mm AF-S VR, postprocessed in Bibble 5 of course.

UPS just delivered the Samyang 14mm F2.8 lens (nikon mount).
The first tests show promise, sharpness is pretty good, and in contrast to earlier reviews it seems that flare resistance is ok as well.Some sample shots below, just download the full size images by clicking the "download" link.

Build quality: very good
Weight: average
Vignetting: not disturbing

It has no CPU so it will not meter on low-end dSLRs. It will meter in A and M mode on the D700 (which I have).
Focus throw is long, especially for a wide end lens like this.Forget about using filters on it, the front lens is bulging outward, and you cannot use gel filters in the back of it.
Even though it is a manual focus lens, working with it is quick and painless.
More impressions in a follow up post.

A great combination :-)

Shot with D700 and Sigma 150mm F2.8 APO Macro HSM
Post-processed (cropping, resizing, vignetting) with Bibble Pro 5