I am a software developer writing a software interface for a Bosch mic 9000i camera. I have an interface to change the focus of the camera and I'm writing documentation for an end user. The numeric focus values that the camera accepts are 0-255. I've been referring to the value range as the magnitude. What should I call a numeric focus value for a camera?
When I increase the focus value, the camera shifts focus to closer objects, decreasing the number brings further objects into sharper focus. Is there a better way to phrase this than 'Focus Near' and 'Focus Far'?