rick.lang wrote:Omar, the Sigma 18-35mm barely covers Super 35. With the SpeedBooster XL on the BMPCC4K it won’t just vignette at 18mm, you may get a porthole. Honest. With the Ultra you will vignette at 18mm.
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I haven't noticed any vignetting with the Ultra and the Sigma 18-35mm, even at 18mm. I haven't tested on a flatly-lit surface, which might reveal slight vignetting. I'll try to do that tonight.
I have the EF mount, and iris control works fine, but focus doesn't. I updated it to the latest firmware.