Alright you know when you hit z on the keyboard and it gets you closer to gun site? well while in that mode you can use the [ ] keys to zoom in or out. Also you sue these keys if you're in a buff in bombsite to zoom in even closer to target: )
As for the .target xxx
* hit / while in game and bring up the text box
*then type .target XXX (XXX represents yards so make it like 340 or 650 or whatever)
*then if you look north there whould be a virtual target in front of you
* get yoru plane faced north and shoot at it
* if you want to see where you were hitting you can type .target 50 to get the target up close to 50 yards so you see where you where hitting or you can just zoom in with the [ ] keys.
* when you are finished you can get rid of the target by hitting .target 0
Also the target comes in handy so you get a graphic illustration of what convergence does.
If you don't know how to set convergence you can go into hanger and at the very top of the clipboard there will be a button that says "set convergence" click on it and you will see colored liens extending from the plane you can put them as far out as 650 yards.
Bascily the convergence is where all the bullets meet. So if you set your convergence to 650 and yoru target is 250 out you will probably be hitting wings instead of the fuselage. But if the target is out at 650 you will have all yoru guns hitting the fuselage that is if your'e aiming at fuselage
For planes with 6 50 cals i have 4 of the 50 cals set for about 500 and 2 set for 300. For the 20mm's if there's only 2 i have them set for 450 if there are 4 20mm's on my plane i set 2 of them for 450 and the other 2 for 250.
People have there own prefernaces as to what they like their convergences set at. So the best way to find out what you like them being set at is to mess around with them