Sigma Mount Converter MC-11 For Use With Canon SGV Lenses for Sony E

Works great on Sony A7R iii. Doesnt seem to work on Sony A6000 (very slow af like 4-5 seconds) Focusing speed takes less than a second to lock on focus. Ive noticed it taking 1-2 seconds to focus if the subject very far away. Very accurate focusing. It works with single shot af and continuous af. On continuous af you will hear an auto focusing noise from the af motor of the lens. It is kinda loud but not noticeable unless your in a quiet area. it goes away after you taken the shot. It doesnt focus at the same speed as Sony native lens. Example: My Sony 24-70 f2.8 takes less than half a second to acquire focus. While the adapted lens takes at minimum half a second to a second. If that half a second is required for you. Than you better off getting the native lens. Poor af in low light. Highly recommended if you have canon glass. Glass I tested on. Canon ef 28 f1.8, Canon ef 50 f1.4, Canon ef 85 f1.8, Canon ef 17-40 f4, Tamron 24-70 f2.8 vc, and Tamron 70-200 f2.8 vc. 1/28/18 Update VC doesnt work from Tamron lenses. Should be turned off or images will be super soft. In body stabilizer seems to work. 10/12/18 update It seems VC on Tamron lenses do work. But you cant have it on with the lens or it will cause random soft image. Have to choose 1 or the other. Also with the new version 2 firmware for A7r iii it lets you use all the af modes now with my Canon lenses. The af speed on version 2 firmware seems to help with the auto focus speed. Seems a bit faster and more accurate. With my Tamron 70-200 2.8 vc mk i it use to hurt a lot when focusing from min to infinity focus. Now the hunting seem to have decreased by quite a bit.

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Verdict: You really just get what Sigma tells: AF only with the Sigma list of fully supported lenses. Not working AF in most other cases. From many very positive reviews regarding the wonderfull working AF with most Canon lenses I expected usable AF for at least some Canon lenses on some Sony bodies. I did not expect very fast AF or even AF-C. But the adapter is completely useless for AF in all my tested combinations. I got focusing times of around 5-10s: Cameras: Sony A7R2, A6000, NEX5T, NEX 5 Lenses: Canon 16-35 1:4 L; Canon 24-105 1:4 L, Canon 85 1;1,8 USM, Canon 70-300 DO IS; Sigma 105 1:2,8 Macro Pro: -very good build -reliable electrical contacts (not normal with cheap adapters) -aperture working with all tested lenses Contra: -Dont expect AF on lenses not on the fully supported list from sigma -if you want to use it with other lenses test your camera/lens combination with the adapter before

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Bought this and the 35mm 1.4 Art lens to use on my Sony A7II, overall Im satisfied with the combo. Adapter seems to be well made and has tight tolerances when connecting to the body of my A7II. Auto-focus speed is acceptable and definitely usable, but it does want to hunt a lot and when that happens it slows the whole flow down dramatically. Update: After more extensive use, I had to remove another star...the hunting while focusing drives me up a wall, it drastically slows down focusing compared to native glass. It also struggles a bit with accuracy in low light and back lit subjects...hopefully they resolve some of these issues via firmware soon cause I do love my 35mm Art.

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