It's a lens with a full metal construction, smooth focus rotation with a 300 ° turn, it has 11 aperture settings from f/2.8 to f/22. The quality of the image wide is very smooth but from f/4 it improves the sharpness. There is chromatic aberration in certain lighting situations.
|Mount||M42, Olympus OM, Minolta MD, Pentax PK|
|Image Format||Full-frame / 35mm|
Wow was not expecting this to be any good for some reason, I was very wrong, I have this 28mm on a OM mount adapter (5 quid Ebay) on my digital Canon and it's Great glass, lovely colours, fine detail and macro, incredibly cheap, I tested it and was shocked how good they are, mine is an OM mount and I use it with my Canon 450d..(a cropped sensor making it a 36mm lens but still wow). I also love the 80-135mm which I think was 10 quid.. Korean made. Love mine to bits.