EFTZ21
- Download the firmware.
- Unzip the file if it is in zip format. When you see the file is in .bin format it’s already ready to use.
- 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.
- Mount the EFTZ21 Pro and and a Sony lens onto the camera.
- Insert the card into the camera.
- Go to ‘Setup Menu’ -> ‘Firmware Version’ -> ‘Update’. Do not switch off the camera while updating.
| Date | Version | Details | |
| 5th Dec 2025 | V1.27 | 1. Optimized the stability of the adapter ring’s compatibility with different cameras. | Download |
| 13th Jul 2025 | V1.26 | 1. Compatible with the new Nikon Z8 3.0 firmware | Download |
| 31st May 2024 | V1.25 | 1. Optimize the Canon EF 17-40mm F4 continuous focus (focus tracking) fluency.
2. Resolves an issue where recording would interrupt at some frame rates when recording video. |
Download |