Based on my bed size of 1000mm x 600mm the location of the camera would calculate as follows:
160 degree lens: 1000mm / 2.7 = 370mm (14.5" height above bed)
140 degree lens: 1000mm / 1.8 = 555mm (21.8" height above bed)
120 degree lens: 1000mm / 1.5 = 666mm (26.2" height above bed)
90/80 degree lens: 1000mm / 1.4 = 714mm (28.1" height above bed)
60 degree lens: 1000mm / 0.825 = 1212mm (47.7" height above bed)
Because my laser engraver is in a fixed location, I can mount the camera on a bracket at any height listed. Most would mount inside the unit, a few would mount above the unit with the lid open.
The question is, is it better overall to have the camera mounted closer to the bed using a wide angle lense or farther from the bed using a narrow angle lens or just shoot for a middle range?
Also, because my bed has a 390mm height adjustment, I will need to make sure the top surface of the object I am scanning is at the same height that the camera was calibrated too?
Couldn’t I also just move the bed all the way down to it’s lowest position and then calibrate the camera with lid close using a 160 degree lens, then capture and generate all the images and then shift the bed up to the appropriate height for actual engraving?