Techart TA-GA3 Contax G adapter not working?????

Started 3 months ago | Discussions thread
iTrax Contributing Member • Posts: 906
Re: Techart TA-GA3 Contax G adapter not working?????

It looks like firmware update is done via Bluetooth and smartphone.

【Techart 】TA-GA3

  • With TA-GA3 adapter.The real time aperture value cannot be displayed on screen.The camera body and the lens are nor couple.The aperture shown on the camera body is just for reference and the EXIF data would not affect metering.When you shooting,the aperture should remain the maximum state to accurate exposure.
  • It is highly recommended to switch off the camera before you change the lens.
  • If you want to change the lens, you don't have to shave the fins,but you must notice the installation sequence.(Especially G21mm G/2.8).First ,the lens adapter mounted on the camera body and then.lense mounted on the lens adapter.

Warning:This adapter can only use on the camera which is Phase Detection Auto Focus(PDAF)at present.So for sony,you can only use on A9,A7II,A7RII,a6300,a6500.

  • Brand: TECHART
  • Lens: Contax G lens
  • Camera Body: Sony A9,A7MII,A7RII,a6300,a6500
  • Aperture: Manual


  • High quality aviation aluminum.The best balance among weight,mechanical behavior and precision.
  • The more powerful CPU and the speed of focus upgrade 50%
  • The bluetooth 4.0 which in low power consumption.Support firmware upgrade mode on IOS and Andriod.

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