Originally posted by smc Those are really great shots. I have only done the obligatory first tests with the K135 F2.5. I do it in 3 steps.
1. Last year I found a toilet paper with a pattern that is really excellent for an initial test of lenses
....It has both low and high contrast pattern. I set the camera on a tripod (or just put in on the table), I focus a little bit longer than minimum focus distance for the lens and then shoot with 2 secs MLU.
2. Shooting a textured roof on one of my neighbour's house where focus is at infinity.
3. I start using the lens for "real" taking lots of different pictures, in other words I use it just like my other lenses and this is of course the best way to judge a lens.
So far I have done step 1 and 2, and my copy seems sharper than my M 135mm F3.5 and K 120mm F2.8 (sold it a few weeks ago). However, I have yet to do some serious real life testing.
Kind regards
.lars