Thread: P4K: EF adapter with working focus/aperture control?

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  1. #1 P4K: EF adapter with working focus/aperture control? 
    Senior Member
    Join Date
    Apr 2017
    Nashville, TN
    I know that neither the Metabones SPeedbooster nor the Vlitrox knock-off can currently control EF lenses, but is there any adapter that can? Doesn't need to be a focal reducer.
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  2. #2  
    None that I tried works with autofocus. I wrote to Viltrox support and they told me they are working on a firmware update for the EM-M1 and EF-M2 adapters that will enable autofocus, but no ETA yet since it seems it's very difficult to code.
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  3. #3  
    Senior Member Asyndeton's Avatar
    Join Date
    Feb 2016
    Portland, OR
    My Speedbooster Ultra is able to control aperture on my EF lenses. Only issue is that it changes aperture on my Tokina 28-70mm only when the lens is set to 28mm, but works perfectly with the Sigma Art 18-35mm.

    There may be a firmware update in the future that will allow autofocus control to work.
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