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Metabones Speed Booster Review: Strength and Weaknesses of Canon EF Adapter for Sony E-mount

Metabones Speed Booster Review: is it good enough for $600?

This was not planned as a test, I’ve bought Metabones Speed Booster┬áfor my wife’s Sony Nex 7 to make it work with variety of Canon lenses we have. We already have a manual-only cheap Canon EF adapter for Sony E-mount (review is here:┬áSony NEX Lens Adapter Review and Image Samples), but since it has no auto focus, woman can’t really use it:-)

So, this was the main reason we bought this nice┬áMetabones Speed Booster, to get an auto focus on Canon lenses we can use on Sony Nex 7 body. ┬áThe rest benefits such ┬áan extra plus F-Stop of lens’s brightness and no┬áreduced crop factor was an awesome bonus for us.

here is what I’ve discovered, watch the video:

Metabones Speed Booster Review Video

 

Metabones Speed Booster Review

 

In addition to this video demonstration I did a test in studio using Canon macro F2.8 L lens mounted on Canon 5D mark II and Sony Nex 7 with Metabones Speed Booster lens adapter. Used a strobe lighting, manual shooting mode, shutter speed 1/200 on both cameras and shot still life with wide open (f2.8 on Canon and f2.0 on Sony), F4 and F16 on each camera.

White balance was set to “flash” on both cameras, I’ve used a camera autofocus on a particular area (same for both cameras), and after I’ve got a focus confirmation, focus was set to manual.

No adjustments to the images were made, all default setting in ACR and then simple resizing or crop and saving for web. See what I’ve got:

 

Metabones Speed Booster v.s Native Canon Macro lens

 

100% Crop, F16: before is Sony with metabones speed booster , after is Canon

Sony-metabones-adapter-f16Canon-metabones-adapter-16

100% Crop, F4: before is Sony with metabones speed booster , after is Canon

Sony-metabones-adapter-f4Canon-metabones-adapter-4

 

 

100% Crop, F2.8-2.0 – before is Sony with metabones speed booster @ F2.0) , after is Canon

Sony-metabones-adapter-f2Canon-metabones-adapter-2-8

 

 

Full images, check the different in lens’s vignetting. Also, there is a noticeable different in a size (you’ve seen it on 100% crops, Sony images are larger): there is a crop factor on Sony, but much less than X1. w/o metabones adapter6

Sony Nex 7 with Metabones speed booster:

Sony Nex 7 with Canon macro F2.8 Lens at F16

Sony-metabones-adapter-full-f16

 

Sony Nex 7 with Canon macro F2.8 Lens at F4.0

Sony-metabones-adapter-full-f4

 

Sony Nex 7 with Canon macro F2.8 Lens at F2.0

Sony-metabones-adapter-full-f2

 

 

Canon 5D MKII with canon macro F2.8 L lens

 

Canon 5D MKII with Canon macro F2.8 Lens at F16

Canon-metabones-adapter-full-f16

 

Canon 5D MKII with Canon macro F2.8 Lens at F4.0

Canon-metabones-adapter-full-f4

 

Canon 5D MKII with Canon macro F2.8 Lens at F2.8

Canon-metabones-adapter-full-f2-8

 

 

Conclusion
Good:

Partially Removes a crop factor from the camera body when used with canon lenses made for full frame DSLR. Adds one F-Stop to the lens brightness

Bad:

Jerky and slow autofocus (might not be a Metabones Speed Booster issue but Sony’s). Noticeable reduction of image’s sharpness on good canon glass. (you may not notice this on average glass).

Would I buy it for $600? Nope, I’d rather get a good manual focus┬áSony E-mount to Canon EF adapter

 

Below are few close-up of the┬áMetabones Speed Booster adapter shot I’ve snapped in a studio

Metabones Speed Booster Review: Strength and Weaknesses of Canon EF Adapter for Sony E-mount

Metabones Speed Booster Review

P.S Do you want to see BTS of this shot iof this metabones adapter? I’ve got it, will be posted soon.

5 responses on "Metabones Speed Booster Review: Strength and Weaknesses of Canon EF Adapter for Sony E-mount "

  1. When you demonstrated the canon lens on the canon body in live view, it was slow. So, you turned off live mode & it was much better. BUT, now I wonder if you turned off the live mode on the NEX would that also be faster AF?

  2. Hi Alex nice review. I wonder if the NEX 6 will focus faster as it incorporates phase detection AF? The NEX 7 only uses contrast detection AF.

    I also wonder if the adaptor may be slow in translating focusing signals between the NEX and the Canon EF lens.

    It will be good to know if anyone else has tried this adaptor with the NEX 6 and/or NEX 5 that also has phase detection AF.

    Thanks

  3. The Canon f4 and F2.8 shots are swapped around and incorrectly labeled.

    The Canon shot is focused further forward than the Metabones shot and there is very little overlap of image where they are both in focus in the comparison crops you posted.

    The only way you can use EF lenses on a NEX is to use an electronic standard adapter/speedbooster otherwise you cannot change the aperture on the lens while it is mounted on the Sony Camera. Metabones makes one of each type as does a company called MXCamera who make similar but cheaper products that do not seem to be made to the same quality.

    With regards the AF of your lenses in the Video, the Metabones site for the EF-NEX speedbooster says:

    *Autofocus speed is very slow and inadequate for most moving subjects. The autofocus speed is unfit for professional use for sure, and it would disappoint most enthusiasts.

    *Only Canon-branded lenses introduced in or after 2006 are officially supported. Autofocus is disabled for older Canon lenses and most third-party lenses, including most Sigma, Tamron and Tokina lenses and all Contax N lenses modified by Conurus.

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