[Klaus]

Funny, this 50/2 I got as substitute for the 56/1.2 APD (which currently is in service because of some rattle in the tube and a wobbly aperture ring - so much to the "metal construction", haha). The APD is slow in dark situations. I thought, no APD filter = always possible PDAF? No true, the 50/2 is even slower if it's dark enough  :mellow: But PZ testers are mostly daylight persons B)  

 

What has slow focus in the dark to do with the lens? We don't do camera tests ...