ETZ21 Firmware


ETZ21 firmware can now be updated via camera

Big News for ETZ21 Users!

ETZ21 users now have the opportunity to unlock the full potential of their adaptor. Access the latest and future firmware enhancements via camera. Enjoy the convenience of wireless firmware updating method and many more future firmware upgrades by following the steps below. Watch our video tutorial to easily access this feature.

Note: If you have already updated to a Linking Firmware once, please proceed to step 9.

  1. Prepare a Micro USB cable clip and a Windows/MAC computer.
  2. Download the Linking Firmware.
  3. Unzip the file if it is in zip format. If the file is in .bin format it’s already ready to use.
  4. Connect the adapter to your computer and a new drive will appear. Do NOT need to remove the original file.
  5. In Windows computers, the original implanted firmware will show as a 0 KB file; in Mac computers, the original implanted firmware does not show.
  6. Copy and paste the firmware you unzipped into the drive. (Do not change the BIN file name)
  7. Eject the drive (VERY important step).
  8. Unplug the USB cable and the upgrade is completed.
  9. Next, download the latest available firmware.
  10. Unzip the file if it is in zip format. If the file is in .bin format it’s already ready to use.
  11. Copy the .bin file and paste it onto the top directory of a formatted XQD/CF/SD card. Do NOT change the name of the .bin file.
  12. Mount the ETZ21 and a AF lens (Sony mount) onto the camera.
  13. Insert the card into the camera.
  14. Go to ‘Setup Menu’ -> ‘Firmware Version’ -> ‘Update’. Do not switch off the camera while updating.

Do you wish to enjoy future in-camera firmware updates available for ETZ21 Pro users? Follow steps 9-14 to ensure your ETZ21 adaptor reaps all the benefits of upcoming enhancements.

Linking Firmware Download

Date Firmware version Details Link
31st May 2024 V1.36*

* The latest  firmware available for ETZ21 and ETZ21 Pro users

  1. Optimize the focus flow of the Sony 55mm F1.8, and optimized the focus speed.
  2. Optimize the focus fluency of Tamron 28-200mm F2.8-5.6 at the 200mm end, optimize the focus speed.
19th Feb 2024 V1.34 1. Solve the problem that the transfer of SONY FE PZ16 – 35G F4.0 electric zoom toggles is not valid.
2. Solve the problem that SONY 70-200GMii can not automatically focus after manual zoom.
Improve the overall stability of the use of couplings.
3rd Jan 2024
V1.33 1. Improve battery draining issue when used with certain lenses
2. Improve focusing performance of telephoto lenses e.g. Sony FE 300mm f/2.8 and 70-200mm FE II, on the telephoto end
3. Improve overall adapter stability
10 Sep 2023 V1.26
  1. Compatible with three brands of lenses: Vitrox, Meike, and Yongnuo.
  2. Improved the efficiency of low-light focusing.
  3.  Targetedly optimized the focus performance of Sigma 14mm F1.4.
  4. Targetedly optimized the focusing performance of Tamron 28-75mm F2.8 G2, correcting the problem that the focus ring is unavailable at MF and the aperture no longer shrinks when it is smaller than F8.
  5. Targeted optimization of Sony 16-35 F4PZ, correcting the problem that the electric zoom cannot be used.
  6. Targetedly optimized the focus performance of Sony 90mm 2.8 macro.
  7. Improved the overall focusing stability of the adapter.
8 Aug 2023 V1.23
  1. Continuous shooting slows down when the aperture is fully open.
  2. Some Tamron lenses cause the screen to flicker.
  3. Sigma DGDN lens focuses too slowly.
  4. Large zoom such as Tamron 28-200 and other lenses with long-focus end focusing performance.
  5. Exposure difference between pictures during high-speed continuous shooting.
  6. Focusing performance of ultra-large aperture lenses, such as Sony FE50 1.2GM at full aperture.
  7. The aperture display of Zeiss Loxia lens and Voigtlander VE lens is wrong.
  8. When the lens aperture is smaller than F5.6, the first picture freezes during high-speed continuous shooting.
  9. Optimization and use of lens travel buttons.
  10. Optimization and use of lens custom buttons.
3 July 2023 V3.20
  1. Update from adapter ring mode firmware directly to native lens mode firmware. 
  2.  A customizable button on the Sony lens can now be used.
  3. Lens brand and model information available in Exif (Note* some lenses do not show brand name)
  4. Better compatibility, including the new Z8 and Z9 cameras.
  5. Supports in-camera lens manual correction.
  6. Better focus performance in some specific environments, such as dark environment focus and focus on solid color objects.
  7. High-speed continuous shooting performance is more stable, including continuous shooting speed and exposure consistency performance.
22 May 2023 V2.13
  1. Resolve Sony E 18-55mm F3.5-5.6 OSS and old Sony lenses compatibility issue.
  2. Resolve Sony 50mm 1.2GM AF-S focusing issue.
  3. Resolve compatibility issue of ETZ21 on Nikon Z30 (v1.1 firmware) and ZFC (v1.4 firmware)
21 June V2.1
  1. Fix the occasion camera freeze with F — bug.
16 June V2.0  

  1. Optimise the focusing performance of older NEX lenses on Nikon and realizing Pinpoint focusing.
  2.  Solve the problem of partial Tamron lenses’ focusing hesitation during video shooting with Z9, e.g. Tamron 70-180 F2.8 (A056) and Tamron 35-150 F2-F2.8 (A058).
  3. Correct the EXIF data errors
  4. Solve the problem of consumption of battery when the camera is off
  5. Improve focusing performance of certain lenses, e.g. Tamron 150-500 F5.6-7 (A57)
  6. No more focus point shifting when the camera wakes up from rest mode or restarts.
  7. Solve a few small bugs on the software side


30 May V1.2.0
  1. Enable autofocus ability with older Sony Nex lenses on ETZ21

Notice: Handling the Megadap ETZ21

1) No ‘Hot Switch’ of lenses.
Always switch OFF the camera before you remove the lens or the adapter
2) No touching on connecting pins/pads
Do NOT touch the connecting pad/pins with your bare hands. Static electricity produced may damage the electronic components in the adapter
3) Leave the adapter on camera
When you swap between different E-mount lenses, switch off the camera and leave the ETZ21 on the camera. Then unmount and mount another E-mount lens.
4)Don’t turn the lens+adapter frequently
Do not turn the lens+adapter back and forth frequently when camera is on or off.