I've been working with an industrial Dahua camera and since I do not have a full model of how the camera works (and because I'm a complete newbie to cameras in general), a few elements are still puzzling me. My goal is to find what the focal plane distance is (in meters).
So first of all, this is the camera and here are the adjustable parameters:
According to the definitions provided by the software:
Zoom: If you press the plus/minus key, the focal length of the video increses/decreases.
Focus: If you press the plus/minus key, the focal plane of the lens moves to the long/close shot.
The ranges are [0, 852] for zoom and [0, 1025] for focus. When I change the zoom, the camera changes its focus automatically for optimal sharpness, so considering the above definitions, I assumed it can't be that hard to find the focal plane's distance. I've no idea what the units are despite having read a bunch of posts on camera zoom and focus, so a little help would be greatly appreciated.