And here I am trying to brighten everyone's day a little.
In Hitech's world the following Milliradian value holds true no matter the FoV you set.
1Mil = 2pixel when constructing a gunsight reticle on a 512x512 bitmap and a size control file with 256 set in it.
All rings and structures are researched and built to the Mil specs using Hitech's settings. When you change the FoV from the video settings at the splash screen, you will change the perceived diameter of the gunsight reticle. But, that will not change the reticle's Milliradian relationship to the environment. You are simply zooming in or zooming out your default field of view.
Depending on the FoV you set, below will be the relative diameter on a 24" monitor of a 100Mil diameter reticle ring.
60 FoV - 1.80 inch dia. <-- 100Mil reticle ring in real life.
80 FoV - 1.25 inch dia.
100 FoV - 1.00 inch dia.
106 FoV - 0.75 inch dia.
120 FoV - 0.625 inch dia.
Now back to my regularly scheduled brightening of the day.