Angular inspiration

Angular inspiration

I acknowledge that an angular measure is technically better than an absolute linear measure. But everybody knows what 10-point type looks like in a book held in your hands, and the ratio of (variable) height to (standard) distance is an angular measure -- indeed, radians, if you were to use the same units. And, keeping things integral is a good idea, but not exactly earth-shaking.

But I find it hard to believe 0.0213 arcseconds for any visible pixel-like object. 10-point type at 18 inches subtends 1.6K arcseconds = 24 arcminutes, or 7.7K μradians. Probably you mean 0.0213 degrees at 28 inches (which is pretty far away). So, a pretty good size for a point is 770 μradians.