With 35 and 50 mm setting there should be a corresponding frame in the picture when I want to crop the dng picture in LR. But I cannot see it on my 27" iMac. On my 13" macbook air it`s ok. I have the same LR6.5 in both.
This is probably an issue with your video drivers. You can try disabling the GPU in LR / Edit / Prefs / Performance and live with the slowness.
If you're doing a lot of cropping of the RAW Leica 28mm files, that old adage springs to mind, "The reason your pictures are not working is that you're not close enough".
Just a thought.
Hi, Ssprengel. I tried but nothing happened. Maybe I must restart LR. I´ll try tomorrow