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SpeedBoosting an APS-C Lens? (Sigma 30mm F1.4 Art + Viltrox)

Started Mar 26, 2019 | Questions thread
rawali New Member • Posts: 1
Re: SpeedBoosting an APS-C Lens? (Sigma 30mm F1.4 Art + Viltrox)
1

The Sigma 30mm 1.4 has a pretty wide image circle for an EF-S lens. I've used it on full frame bodies to shoot film and, while it does vignette pretty hard, there is still information all the way to the corners. I've also used it on APS-C bodies (M200, M50, R7) with the viltrox EF-EOS-M2 and EF-R3 speedboosters. Your final crop factor with the speedboosters ends up being 1.12 so you're copping out a lot of the vignetting. It's still not as bright as a proper full-frame lens but still perfectly usable. The only downside I've noted so far is that on the R7 with the Viltrox EF-R3, I can't go all the way down to f1. f1.4 is the best I can get which is a bit unfortunate as I need every little bit of light I can get.

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