Review: Techart Canon EOS EF/EF-s to Sony NEX Adapter

The Sony NEX mirrorless cameras have certainly helped boost the sales of mirrorless cameras but the downside is a lack of lenses. While there a a handful of different adapters available, so far they haven’t really given the full power of the Sony NEX platform….until now. The Techart Canon EOS EF/EF-s to Sony NEX Adapter is the first adapter to provide auto-focus and aperture control to Canon lenses. This opens up the Sony NEX system to a huge number of lenses from Canon, Sigma, Tokina, and others.

What is it?

The Techart EF/EF-s adapter connects to the Sony NEX line of cameras as if you were putting a lens on the camera. Once the adapter is in place, you can then put any Canon EF/EF-s compatible lens into the adapter.

  • AF support when using Canon EF/Ef-s lens (entire USM and non-USM lens) on Sony NEX body.
  • True electronic integration of aperture diaphragm – You can change the aperture on camera body (S/M mode) or let the camera choose aperture automatically (P/A mode).
  • Support USM and I.S..
  • Can change the aperture when taking movie (on NEX 5n or later model).
  • Show aperture, shutter speed and focus distance in EXIF.
  • Easy to use, do not need extra accessories, like external battery and etc.
  • Removable tripod foot, more fixable and convenience.

Sony NEX 5n with Canon 70-200mm f/2.8 L

Who is it for?

While I don’t imagine anyone buying an adapter so that they can then go make a big investment in Canon glass, I do see the adapter being a great fit for someone who already owns a selection of lenses for their Canon bodies and wants to be able to use that equipment with their Sony NEX camera.

Basically, I am the perfect purchaser of the Techart adapter. I have about half a dozen lenses which amounts to quite an investment in glass and while I don’t always want to use a Canon lens on my Sony NEX 5n, there are certainly times I would like a bit more selection than the two Sony lenses I have.

How does it work?

The Techart EF/EF-s adapter is a passive device, meaning that once it is on your camera and a lens is plugged into it, there is nothing to do but forget that it’s there. The adapter takes the signals from the Sony NEX camera and converts it into signals that the EF/EF-s lenses can understand. The adapter allows the NEX bodies to control the aperture and auto-focus.

While the auto-focus technically “works”, it is painfully slow most of the time. The folks at MXCamera did tell me the auto-focus was going to be slow so it wasn’t a big shock although I had hoped that it wasn’t going to be as slow as it is.

What makes up for the slow focus is when you switch the lens to Manual Focus and use the Focus Peaking function of the Sony NEX. With just a little practice you can be extremely fast and accurate with manual focus.

Here are a few test shots using the adapter:

Shot with Sigma 24-70 f/2.8

Shot with Sigma 24-70 f/2.8

Shot with Canon 40mm Pancake Lens

Final Verdict

The Techart Canon EOS EF/EF-s to Sony NEX Adapter does what it claims to do although I wish the auto-focus was faster. However, being able to use my entire line of Canon and compatible lenses combined with Focus Peaking really makes up for it.

As many of you know, I am a big fan of the Lensbaby lenses and the combo of a Composer Pro, a Sweet 35 or Edge 80 optic, and the Techart adapter makes using a Lensbaby easier than ever. Since you can see exactly what you are getting and being able to use Focus Peaking for perfect focus means you can actually be quite quick when using the Lensbaby Composer in this setup. So far I have tested with six different lenses from four different manufacturers and all of them have worked perfectly (except for slow auto-focus). Some lenses are better suited for manual focus than others because some lenses have a very short amount of turn on the focus ring  where ideally you want at least a quarter of a turn.

Additional images

Currently the Techart Canon EOS EF/EF-s to Sony NEX Adapter is available from MXCamera. For more information or to order, visit their website at


Kerry Garrison lives in Castle Rock, Colorado with his wife and two dogs. With 10 years of experience shooting products and 5 years of experience in the wedding industry, Kerry brings a good deal of technical know-how and can explain topics in easy-to-understand terms.

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1 Response

  1. Sebastian says:


    I got the NEX VG20, been searching everywhere for an adapter for my Canon EFs 17-55 mm lens. Shoot a lot so do you think everything will work properly with this adapter? Ive heard something about AF not working in video mode, but other then that everything should work.

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