Even though the border performance is a little disappointing, there are applications for this kind of lens, of couse. This is a pretty interesting lens if you want to isolate a (near-centered) object from the rest of the scene using an ultra-large aperture setting. The quality of the bokeh depends somewhat on the background/foreground structure - it can look "smeary" close to the image borders if the scene is a bit nervous. This is probably a side effect of the low resolution here. In coarse structured scenes the bokeh can be quite smooth and buttery though.

Can you use this lens for general purpose photography ? Well, naturally you can, but at comparable apertures many good standard zooms can produce a more even resolution distribution across the frame specifically in the extreme corners.

Optical Quality (Technical):
Mechanical Quality:
Price/Performance:
	What does this mean ?