05-19-2012, 02:44 PM
I don't know; we've drifted off topic. My comment was based on more than just Klaus review; but as you've shown the lens can be made to produce decent blur. Part of the issue is the optical design; but it could also use a few more blades; as well as a bit of flare resistance and .... Having said that it is relatively inexpensive and reasonably sharp so not bad for an old design. Anyways we should probably stick to commenting abuot the pentax lens in this thread (for which I have no comments).