tried one today with... Z-1p. I can not be 100% sure (haven't get my film developed yet), but by looking through viewfinder I would say it doesn't vignette at all! Solid build quality (btw, it is made in Vietnam) and very smooth focussing.
Looks quite strange at my camera anyway... something like a 300 EUR front cover :)))
http://www.eol.ee/~margus/arvutikasutaja/pancake.jpg
BR, Margus Tallinn, Estonia
