Originally posted by ivanvernon This is a pretty sharp lens, and when used carefully seems to behave more like a super wide standard lens, though it is also easy to frame shots that clearly exhibit the fisheye effect.
That's fairly logical, given the significantly larger Kiev-88/Pentacon 6 negative format of 56mm x 56mm (79,2mm diagonal) vs. the sensor size of 43.8mm x 32.8mm (54.7mm diagonal) in the 645z. Looking at pictures on Flickr, it actually seems to perform rather well all the way to the 6x6 corners. Never seen one for real - maybe I should repair my Pentacon 6 and find one ...