Why I have chosen for the 20s and not for the light-gathering power of 25:
1. The 20 is slender (Objetivlänge) and contributing so on as the 25er.
2. The 20er has "only" a luminous intensity of 1.7 as opposed to the 25er with 1.4, but is about 200 euros cheaper than the 25er.
Picture quality:
There's really nothing negative, very nice exemption possibilities, very sharp images.
Autofocus:
Here I have to confirm, in low light the AF tends to "pump" that I knew but by searching the network beforehand.
I'm going to upload a raw image (the rusty tin on the tracks), as one can see what is possible with 1.7.
I highly recommend this lens, despite the slightly slower AF (in low light), fully recommend for OMD
and I would buy it again at any time!
Best Regards,
Holger Goetz