Using the same process as example problem 1, we first define the needed variables outlined by the formula. In this case, the values are provide as:

Fov photographycamera

Enter the laser power (watts) and the frequency of the laser (hz) into the calculator to determine the Laser Pulse Energy.

In other words, SU has been using the left column to convert AOV to focal length when it should be using the middle one because vertical AOV is what SU’s camera is based on.

Fov photographyexamples

I’ve been looking at all these things again recently, and after some discussion in another thread, I think SU’s FOV conversion is actually mixed up.

Fov photographykit

My understanding is that SketchUp uses the vertical angle of view, and that agrees with what I find when I do Match Photo. However, if you set the angle of view to 81.2°, which is the vertical AOV for a 14mm lens, SU reports that as a 21mm lens. 81.2° happens to be the horizontal AOV for a 21mm lens, so I’m wondering if this is an error in the formula that’s been used all these years by this function.

Using their formulas I was able to make my own table of frequently used lenses for 35mm/Full Frame photography. (BTW, 43mm is the theoretical “normal” focal length for 35mm film frame)

The following two example problems outline the steps and information needed in order to calculate the Laser Pulse Energy.

First of all, Filed of View is actually measured in units of length like feet or meters, and Angle of View is measured in degrees, so the term hasn’t really been used correctly by SU all these years.