Firmware download
Windows Edition Download
Ver.02 For Sony E-mount
- AF assist function during video recording is now supported.
- *Only SONY camera models with AF assist function are supported.
- The focus distance shown on the screen during manual focus has been optimized.
Your device does not support this download service.
Update Procedure
STEP 01 Operating the Software Program
Select the file “Update_SigmaC20F2V2.exe” that has been downloaded onto the computer and double-click it to operate the software program.
* Do not connect the camera to the PC at this moment.

STEP 02 Check the camera status
Turn on the camera and select “USB Connection” from the Menu. Then select “Mass Storage”.
* Some cameras do not require this process.
* Do not connect the camera to the PC in this process.
STEP 03 Connect the camera to the PC
1. Ensure the memory card is removed while the lens is attached to the camera. Then use the supplied USB Cable to connect the camera to the PC.
2. After connecting the camera to the PC properly, select the “Next” button in the “Lens System Software Updater” and the below message will appear on the display;
* The message “Follow computer instructions.” will appear on the camera display.

In the case of “The update is not available for your lens” message appears, check the Lens System Software Updater is compatible with the lens to update.
The message appears even when the software and the lens are appropriate, close the Lens System Software Updater and remove the cable and power OFF the camera.
Then, start over the update process from the STEP 01.

In case the message “Could not find a camera applicable for this update” appears, follow the instructions in the dialog to check the status.

STEP 04 Check the firmware version of the lens
Check the “Update Information” in the bottom left and confirm if the firmware version needs to be updated to Ver. 02.
Click the “Next” button to update it.
If the lens firmware is already Ver. 02, this process can be skipped.

STEP 05 Update the lens firmware
1. After checking the “Update Information”, click the “Next” button to start transferring the software data to the camera.

Do not power OFF the camera and ensure the USB cable is properly connected during the data transfer.
2. Once the data transfer is over, the following message will appear on the display, so click the “Finish” button.

3. After closing it, the message “Updating the lens” will appear on the camera display, and the firmware update of the lens will start.
STEP 06 Finish updating the firmware of the lens
When the message “Lens update complete.” appears on the camera display, the firmware update of the lens is successfully over. Follow the instructions on the screen to close the process. After closing it, remove the USB cable from the camera and the PC.
* After the firmware update is complete, turn off the camera and remove the battery or AC adapter. Then reinsert the battery/AC adapter and reboot the camera.
STEP 07 Confirm the updated software version
Check the “Version.” from the camera menu, and confirm the lens version is updated to Ver. 02.
Mac Edition Download
Ver.02 For Sony E-mount
- AF assist function during video recording is now supported.
- *Only SONY camera models with AF assist function are supported.
- The focus distance shown on the screen during manual focus has been optimized.
Your device does not support this download service.
Update Procedure
STEP 01 Operating the Software Program
Select the file “Update_SigmaC20F2V2.dmg” that has been downloaded onto the computer and double-click it to operate the software program.
* Do not connect the camera to the PC at this moment.

Login from the Administrator account to start up the Lens System Software Updater.

STEP 02 Check the camera status
Turn on the camera and select “USB Connection” from the Menu. Then select “Mass Storage”.
* Some cameras do not require this process.
* Do not connect the camera to the PC in this process.
STEP 03 Connect the camera to the PC
1. Ensure the memory card is removed while the lens is attached to the camera. Then use the supplied USB Cable to connect the camera to the PC.
2. After connecting the camera to the PC properly, select the “Next” button in the “Lens System Software Updater” and the below message will appear on the display;
* The message “follow the instructions on the computer” will appear on the camera display.

In the case of “The update is not available for your lens.” message appears, check the Lens System Software Updater is compatible with the lens to update.
The message appears even when the software and the lens are appropriate, close the Lens System Software Updater and remove the cable and power OFF the camera.
Then, start over the update process from the STEP 01.

In case the message “Could not update” appears, follow the instructions in the dialog to check the status.
STEP 04 Check the firmware version of the lens
Check the “Update Information” in the bottom left and confirm if the firmware version needs to be updated to Ver. 02.
Click the “Next” button to update it.
If the lens firmware is already Ver. 02, this process can be skipped.

STEP 05 Update the lens firmware
1. After checking the “Update Information”, click the “Next” button to start transferring the software data to the camera.

Do not power OFF the camera and ensure the USB cable is properly connected during the data transfer.
2. Once the data transfer is over, the following message will appear on the display, so click the “Finish” button.

3. After closing it, the message “Updating the lens” will appear on the camera display, and the firmware update of the lens will start.
STEP 06 Finish updating the firmware of the lens
When the message “Lens update complete.” appears on the camera display, the firmware update of the lens is successfully over. Follow the instructions on the screen to close the process. After closing it, remove the USB cable from the camera and the PC.
* After the firmware update is complete, turn off the camera and remove the battery or AC adapter.Then reinsert the battery/AC adapter and reboot the camera.
STEP 07 Confirm the updated software version
Check the “Version” from the camera menu, and confirm the lens version is updated to Ver. 02.