Three questions

Reduce the FOV how? Btw congrats on the frame thing, I didn't realise it was referring to the targeting brackets.

[Vanant 2]

In the main.ini:

FOV = 70

At least for a 16:10 monitor, 70 is ok.

[Rastix]

Google translation

And has a maximum diameter of the vessel, the frame seems to be included with the transparency
; Frame transparency decreases with decreasing diameter


The minimum diameter of the vessel, the frame is visible for visibility without transparency

[Goblin Wizard]

Generally, to read Russian text you need to change code page to windows-1251. You'll see the normal Cyrillic letters which you can copy/paste to google or babelfish (sometimes easier to understand).