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Noah Richardson | Issues with the Metabones Canon EF-M43 Speed Booster @noahthecubeguy | Uploaded May 2015 | Updated October 2024, 7 minutes ago.
Hey! I just put together a quick video to show you the issues I'm having with the Metabones Canon EF Mount. If you had or have the same issues, I hope this helps!

Results from the first Metabones Speed Booster Mount that I received to use on my Panasonic GH4:

1) Canon EF 50mm f/1.4 - Electronic communication didn't work
2) Canon EF 15mm f/2.8 Fisheye - Electronic communication didn't work
3) Canon EF 100mm f/2.8 Macro - Everything worked
4) Canon EF 70-200 f/2.8L - Everything worked

*The mount fit nicely to the camera, not too loose but not too tight
*Metabones told me that version 1.6 should fix the issue with the electronic communication

Results from the second Metabones Speed Booster Mount that I received to use on my Panasonic GH4:

All of the lenses that I mentioned above WORKED on the replacement mount. I'm able to change the aperture electronically from within the GH4!

Conclusion:

If you get a Metabones Canon EF-M43 Speed Booster Mount that doesn't work with an EF lens that you know should work, return it until you get a mount that works.

Here are two examples I've shot so far using the GH4 with the Canon EF Speed Booster.

1) Canon EF 50mm f/1.4 youtube.com/watch?v=Uiws0ZbpkwY
2) Canon EF 70-200 f/2.8 (Handheld) youtube.com/watch?v=zCb5JkqDvz4

Follow me on Twitter for video updates and Rubik's Cube giveaways! twitter.com/richardson_noah
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Issues with the Metabones Canon EF-M43 Speed Booster @noahthecubeguy

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