Originally posted by lytrytyr This space intentionally left blank.
If people try really hard, they will find issues with *any* lens. Even Leica.
As an illustration, my boss got his first DSLR this year (he didn't follow my advice and went with Nikon because of Ken Rockwell. That should tell you something to start with...). Anyway, one day he was complaining about his new Sigma 17-50 2.8, that it wasn't sharp. Turns out he was pixel peeping at 200% and 400% per cent... and also had focusing issues that I helped him with. Now he seems much happier with it...
Even pixel peeping at 100% is a waste of time. Which is something I do sometimes, but a waste of time nonetheless. Some of the best pictures of my kids aren't razor sharp, for many reasons. But they're my favorites because they still turned out really good. Some are even good printed out
For a lens like the 20-40, with its build and very good IQ (even if it's not exceptional like FA Limiteds) at the 600something dollar range, is a tremendous deal. Pair it with a 15mm and 77mm, put a K-S1 in the bag, and you have a killer travel or hiking setup (take the 70 if you want the set to be even lighter...)