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This EF-M2 is fantastic! Its definitely worth the money for what it accomplishes. No loss of quality and functions similar to the Metabones Ultra 0.71X! Keep in mind it will take EF-S lenses with EF style mounts on them EF-S with extruding ring will not fit at all ex. 55-250mm f3.5-5.6 STM IS doesn't fit but Sigma 18-35mm F1.8 EF-S (EF Mount) works and fits!
Verified purchase: Yes | Condition: New
The corners are too soft below f4 and there is also chromatic aberrations. Tested with thesigma 18-35 on my G85, autofocus is slow and stupid at video, but in stills its works great. I have a two problems. 1st is then you are take of the lense from the connected adapter you get the message "lense attachment failed..." And because of it i cant use my manual lenses with adapter. I can use it only with electronical lenses. 2nd problem is then you a use outer aperture switch, you cant select the aperture value using the wheel on the camera.
Verified purchase: Yes | Condition: New
Don't listen to the guy above, I got my adapter and it is working fabulously. It works with my Sigma 18-35 F1.8 and i think any other lens will work on it. But really, this is a real bargain from the oriignal Metabone Speedbooster, it even gives you the hard case like Metabone would.
Verified purchase: Yes | Condition: New
good product, 700% cheaper than a speedbooster, but as good as the original
Verified purchase: Yes | Condition: New
For the money this is a ok booster for video use, but for still use the corners are too soft below f4 and there is also quite visible chromatic aberration in both video and stills.
Verified purchase: Yes | Condition: New