12 of 13 people found the following review helpful
Superb and does work with the a7/a7R FE mount with some DIY!
, 5 Dec. 2013
This review is from: Viltrox AF EF-NEX Lens with Mount Adapter for Sony Camera (Camera)
23-12 EDIT: Even more impressed with this adapter now. I recently tried it with a friends Zeiss and Sigma 3rd party Canon mount lenses and it operates aperture and AF on both lenses. Some of these adapters will only work with Canon EF lenses. I also tested it with an Canon lens with the IS function and that worked fine too! Very impressed for the price.
I was amazed at the price of this adapter. It feels solid and of good quality. Unlike some of the other ones it also relays the correct focal length of lens attached to the camera so it is correct in the EXIF data, unlike some others that just report 50mm whatever lens you have attached. The EXIF won't tell you which lens is attached, but at least the focal length helps for distortion correction.
AF is slowed down due to the Canon lenses being set up for phase-detection AF of the DSLRs and the a7 uses contrast detect only with 3rd party lenses, so there is a bit of going back and forth until it locks on, but it does work! Can be quite a bit slower than the native FE lenses though. Manual focus works well with peaking, but operating the focus ring doesn't automatically provide the zoomed focus-assist view. Aperture control also works well. I haven't tested a lens with IS, but I'm lead to believe that it powers the IS system too.
On the a7 it will recognise it as an APS-C lens and apply the crop automatically, so you need to make sure the camera is set up for full-frame (FX) permanently and not Auto mode in the menu.
If you attached the adapter as it is then you'll get the corners chopped off on the a7/a7r, but that is because of the plastic baffles block the corners in the adapter and a little DIY work and you can make it suitable for the FF sensor in the a7.
TO ADAPT TO THE A7 FE MOUNT
Remove the screws from the rear of the adapter around the NEX mount and slowly pull it away. Pop out the piece of plastic in the back (with Made in China written on it). This dislodges the NEX electronic connection, so you will have to glue that into place, but it isn't too difficult as there are pins to line it up within the metal mount - just be sure to do this accurately otherwise the connection won't line up properly when attached. Take a small hacksaw or knife and very carefully remove approximately 7-8mm from the plastic cone within the inside of the adapter, especially in the corners - being VERY careful not to damage the electronics or ribbon cable. Re-assemble, screw the rear mount back on and if you've removed enough of the internal baffling then you can get a full-frame image with no vignette - I've used it this way with the 17-40 and at 17mm you can see a tiny bit of drop off in the extreme corners, but not enough to be a problem. Obviously you'll invalidate your warranty so do this at your own risk!!!
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