- Posts: 71
- Joined: Thu May 22, 2014 4:19 pm
The B4 Lens Mount for the Ursa Mini (it is not an adapter, but replaces the PL mount) optically is the same correction as the Ursa Mini Pro B4 Mount. The UM4.6 B4 Mount (as does the Pro) optically corrects the lens to work in a single sensor camera, eliminating the CA on most lenses. Also, the image is expanded about 1.3X to insure coverage on the HD window mode. Some better B4 lenses, like the newer Fujinon zooms or the cine zoom will even cover the 2K window mode.
So you will not get any vignetting with a good 2/3rds B4 lens in HD window, wither the ENG zooms or,the 2/3rds Cine lenses that pop up every now and then on the used market.
Cheers