Metabones Speed Booster (Canon EF - Sony E-mount) versions

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semick New Member • Posts: 5
Metabones Speed Booster (Canon EF - Sony E-mount) versions

Hi!

I am looking for used Speedboosters and got pretty confused about which versions of the Speedbooster (Canon EF ot Sony E-mount) do exist and which pros and cons each have.

I am currently using the Metabonek Mk4 on the A6300 and am looking for a Speedbooster with about the same autofocus capabilities (AF-S and AF-C for photos, I don't care about video AF).

Currently, I am aware of the following Speedboosters

  • (SPEF-E-BM1) Canon EF Lens to Sony NEX Speed Booster
    • On the adapter it says: EF - E mount Speed Booster
  • (SPEF-E-BM2) Canon EF Lens to Sony NEX Speed Booster ULTRA
    • On the adapter it says: EF - E mount Speed Booster Ultra
  • (SPEF-E-BT4) Canon EF Lens to Sony E Mount T Speed Booster ULTRA 0.71x II
    • On the adapter it says: EF - E mount T Speed Booster ULTRA
      • (What does the "T" stand for?)

Did I miss some versions? How good is the autofocus on which version, compared to a - say - Metabones Mk4 Adapter?

Thanks & Cheers ^^

Sony a6300
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