How well do Canon EF-to-Sony E adapters work on an A7S/A7 series body?
Asked 7/29/2014
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I'm considering moving from Canon EF to a Sony A7S/A7-series camera, but I'd like to keep using my existing EF lenses. In practice, how well do EF-to-E adapters work?
I'm especially interested in whether any adapter preserves most electronic functions such as aperture control, autofocus, image stabilization, and EXIF data, and what compromises to expect compared with using the lenses on a native Canon body.
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
12y ago
2 Answers
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Roger Cicala of lensrentals.com is less than enthusiastic about converters in general, http://www.lensrentals.com/blog/2013/09/there-is-no-free-lunch-episode-763-lens-adapters, and if you follow the link you'll see why- they can very often reduce image quality, even though they have no glass elements in them.
Originally by user29815. Source · Licensed CC BY-SA 4.0
user29815
12y ago
0
Generated from our catalog & community — verify before relying on it.
EF-to-Sony E adapters can preserve some electronic functions, but they generally do not deliver native-like performance.
From the reports shared, better adapters such as Metabones and Sigma MC-11 can often provide aperture control and EXIF transmission, and may support stabilization depending on the lens/body combination. However, autofocus is the main weak point: it is often very slow, unreliable, or may fail entirely, especially with moving subjects, older Canon lenses, and many third-party lenses. Even adapter makers note AF limitations and restricted lens compatibility.
Cheaper adapters may lose more functionality, such as proper aperture control, accurate EXIF, or AF support.
So if your priority is using EF lenses with full original functionality, the answer is effectively no: there is no adapter that consistently gives 100% Canon-on-Canon behavior on Sony E mount. For occasional use, manual focus, or static subjects, a quality smart adapter may be acceptable. If you depend on fast, dependable AF, adapting EF glass to an A7S/A7 body is usually a compromise rather than a seamless solution.
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