Applies to: Argus PT.
Step 1. Turn ON the power button to power the camera.
Step 2. Rotate the lens to find the reset hole. And then insert the reset needle into the reset hole of your camera.
Step 3. Press and hold for several seconds until you hear the prompt “Please release the reset button” or a short beep music.
Step 4. Done! You've successfully factory reset your camera.
Also. here is a video for your reference: