Techart Auto Focus AF Contax G lens to Sony E NEX A7 6 7 5R A7R adapter Ver. 2

Product Code: adp-637
Availability: In Stock
Tags: Auto Focus


New Techart Contax G lens to Sony NEX adapter 
(2nd version) - Auto Focus Function

Support auto focusing, fast focusing

Deliver with Registration



Detail Information

The adapter is new, top of the line quality.

Suitable for all Sony NEX cameras and certain types of Contax G lenses,supports auto focus function with NEX cameras.

  • 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).
  • 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.

1. Put red marks of the adapter and lens collar together. 
2. Turn the adapter anticlockwise till the fixative click. 
3. Set Contax G lens.

To remove the adapter you should turn the adapter clockwise.


  • Suitable Lens:
  • Biogon 21mm f/2.8 (but please be noted that the rear lens flange has to be cut)
  • Biogon 28mm f/2.8
  • Planar 35mm f / 2
  • Planar 45mm f / 2
  • Sonnar 90mm f/2.8


You need to set aperture manually. The real time aperture value cannot be displayed on screen. The camera body and the lens are not couple. The aperture shown on the camera body is just for reference and the EXIF data would not affect metering.

If camera flash is used, it is suggested to set the lens aperture and camera body aperture the same. Otherwise the flash output may not be correct.

It is also highly recommended to switch off the camera before you change the lens.

Manual focus is Enable (final version only)

See user manual for reference

Addition information (updated on 7/3/2013)

Test Camera:

NEX 5, 5N, 7, 6, VG 900 (photo mode)

Package Included

Techart Contax G lens to Sony NEX Adapter (2nd version) (auto focus function) x 1

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