Thread: EF-S professional Mod - EF replacement bayonet mount

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  1. #1 EF-S professional Mod - EF replacement bayonet mount 
    Junior Member Meiereika's Avatar
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    Hey folks,
    just purchased a Canon EF-S 17-55mm 2.8 and got really bummed when I found out that it does not fit my BMPCC Speedbooster.
    I came across some videos that had a simple solution for this problem by just taking out the plastic part of the bayo mount.

    Since the lens is then exposed to all its electronics I'm a bit concerned, if this a permanent solution.

    Instead of doing the modification to the bayo mount yourself (by sawing it off - just like here https://youtu.be/lSxT-R0T29o?t=1m3s), is there a professional solution?
    Maybe a company that offers those modded plastic parts for the EF-S bayo, so that it can easily fit regualr EF mounts?
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  2. #2  
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    not sure it was the same lens but i recall seeing that you can simply zoom the lens in, put your finger in the hole and pull out the rubber part stopping you from mounting it. But double check this.
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  3. #3  
    Junior Member Meiereika's Avatar
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    This is exactly what I did. And now it works just fine.

    But now there is a hole, where the plastic part used to be. So what I am looking for is a flat piece of plastic that will still let me mount it on regular EF mounts!
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  4. #4  
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    Ah for that then I have no idea, it's a shame that Canon decided to make such slightly different mounts.
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