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Metabones EF-RF Speed Booster: non-scientific review

Started 4 months ago | Discussions thread
Swerky Contributing Member • Posts: 793
Re: Metabones EF-RF Speed Booster: non-scientific review

Hello. I’m planning on replacing my full frame DSLR with a mirrorless body while adapting my lenses. I first considered getting an R6 with adapter, but that option might still be too expensive for me. Then I thought of the R7 with a speed booster. I’d save myself a few hundred bucks and possibly get better battery life from the R7.

I looked on the forum before asking the question and found your informative thread.
Reading the comments, are you saying that the speed booster won’t give the exact focal length as on full frame? Say I have a 24-105 lens, with the speed booster on R7 it will have longer equivalent viewing angles?
And about the bonus fun stuff, I wish you said that there’s an option to keep the lens projecting its native full frame circle unto the APS-C sensor, making a 100mm lens a 160 for example like on a regular adapter, but that’s not even possible given there are optics in the way.
Any clarification concerning the question above is appreciated.
I also found this second more expensive speed booster from metabones. Perhaps a newer one? Seems to do the same thing.
https://www.bhphotovideo.com/c/product/1682914-REG/metabones_mbspef_efr_bt2_canon_ef_lens_to.html/overview

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