just to add one thing, you say:

the effect is a zoomed out image, with everything smaller. I find it harder to see distant enemies

What you describe is exactly the point of raising the field of view.

It's like using a wide angle lens, so it's obvious that everything is smaller, but if your monitor is bigger, then it will compensate for that. Vertical fov doesn't play a role in this. At most it's useful if you don't like 'fat' players

Did you change monitor? For instance when I started ET I played on a 4:3, 17'' screen, the __base__ of the screen was 34 cm (not the diagonal)

Let's assume I used 90 fov, now what's the fov for a 16:9 monitor with a __base__ of 50 cm? (note that I __don't__ even care about the resolution here, if I want the same size, resolution doesn't play a role)

90/2 = 45, so 45 degrees are 34/2 = 17cm in my old monitor.

I want in the middle of the new screen the same size as the old. 50cm/2 = 25cm, this is the half of the new screen.

So if 17cm is 45 degrees, how many degrees is 25?

the tangent of 45° is 1, 25/17 = 1.4705882352941178, so I want an angle whose arctangent is that.

here is a website where you can do the calculation but you can use a spreadsheet or calculator, jsut pay attention to the fact that angles are usually in radians not in degrees

http://www.rapidtabl..._Calculator.htm

arctan (1.4705882352941178) = 55.78429787 it was half the screen so I multiply *2

and I get FOV = 111.56

this way I will have the same horizontal size as my old monitor, plus 2 extra parts at the sides