Quick Overview
For decades a variance of four times the magnification range was the acceptable or should I say tolerated. Shooters around the world had to qualify what variance was acceptable for their application but that's all over now. The shooter often needs to know that a scope can provide an endurance level that certain circumstances may demand. Yes, we do offer several model and we are working on more; but these options are to enhance light transmission meeting demands the extreme magnification ranges offer.
For the first time BOS offers the serious shooter all of these features in one package. BOS "50 Proof"sm Scopes.
Now you can get up to a 10 or 14 range factor on magnification. You can pick a 1.8-18 x 44mm, or 2.5-35 x 56mm, and they are what we call "50 Proof". That means, suitable for use on a 50 caliber BMG. When it comes to durability BOS will be second to none. When your ready to move up to a system that you'll not have to ever doubt, we are ready to provide you with just that.
Then there is our MILE SHOT(tm) This is the 3-30 power by 56mm unit fitted with a ultra high range elevation adjustment for those really long shots. (Also 50 Proof)(sm)
| item | BX220 |
| power | 1.8 - 18X |
| objective diameter（mm) | 44 |
| eyepiece diameter（mm) | 37 |
| FOV（M @100M) | 17.3-1.73 |
| Objective view angle（mm) | 9.9o-1o |
| exit pupil （㎜） | 8.2-2.5 |
| Nearest focus range(YDS) | 10 |
| coating | multicoated |
| lens quantity | 13 |
| mounting length | 143mm |
| parallux type | side focus |
| parallux | ±0.125 |
| eyerelief(inch) | 4.5-3.75 |
| reticle | optional |
| base of tube（mm) | 30 |
| ocular diameter（mm) | 44 |
| finish | blackmatte |
| eye guard | yes |
| diopter | -3～+2 |
| windage range(in) | ±30 |
| elevation range(in) | ±30 |
| click value | 0.25MOA |
| length（mm) | 332 |
| structure | mono tube |
| waterproof(Y/N) | yes |
| Forgproof(Y/N) | yes |
| shockproof(y/N) | yes |
