The FOV's are matched, look at the Actual FOV in the output. And since we are matching the ironsight/ADS you can't compare the numbers directly. Check the 360 distance and as mentioned the Actual FOV and see that they are identical.
Since I also match the FOV it doesn't actually matter. When the FOV is the same, all conversion methods will give the same result. If you don't want to match FOV, do indeed use Viewspeed instead.
Ok, so the 16:9 stretched to 16:10 doesn't actually affect the sensitivity, so you can ignore that.
For hipfire, do this:
Then match both Zoom 1 FOV and sensitivity to Ironsight:
Lastly match Zoom 2 to ACOG:
I've added the zoom sensitivity with the inaccuracy as a sidenote. It is within 2% accurate above FOV 106. Hopefully the devs will fix it soon.
I analyzed every FOV step between 100 and 140 to get all the data, the blue line is the actual 360 distance, the orange line is the calculated 360 distance.
Yeah, it's really illogical that the hipfire sensitivity is unaffected by FOV change while the zoom is affected by it even though it has a static FOV...