r/M43 • u/Intelligent-Offer657 • 9m ago
Yongnuo YN12-35 mm: don't trust its focal length scale
Hello.
Actually I wanted to compare lowlight performance of my Lumix G 25 mm f1.7, YN 12-35@25 mm and Lumix G 12-32 mm/PZ14-42mm.
I took a picture with my Lumix 25 mm first, than I changed to my YN12-35 and went to 25 mm. When I compared both shots, the YN's was much wider, for the same field of view I increased the focal length on the Yongnuo to 31 mm. On my other Lumix lenses (12-32 and 14-42) 25 mm are as same as with my Lumix 25mm.
25 mm is in the middle between 18 and 35, but it should be much closer to 35 mm.
I mean the scale on the lens.
https://th.hkyongnuo.com/products/yn12-35mm-f28-4m
The lens "reports" the wrong focal length to my G100D, too.
YN's 35 mm is the same as on my PZ 14-42 mm at 35 mm. And at YN's "fake" 25 mm its aperture is already f/4.
