I was given the chance to try a brand new M. Zuiko 25mm f1.8 so of course I did not let the opportunity pass. It was no surprise the lens is great. It's like the M. Zuiko 45mm f1.8 except this one comes with a hood. The black version also didn't seem plasticky to me. Unfortunately, I did not get the chance to compare it with the silver version. I'd expect it would be similar to the 45mm f1.8. The biggest surprise to me is that the lens is made in Japan.
