Re: optics data

"Matteo" <[EMAIL PROTECTED]> writes:

>About optics used on rifle, what does the data numberXnumber mean?
>For example in "Trijicon ACOG 4X32 Day Optic" I suppose that the first "4"
>is the zoom factor, but what about "x32" ?

Diameter of the objective lens, in millimeters.  Larger objective does
not necessarily but in practice often implies a larger field of view,
and it always indicates greater light-gathering ability.  A 4x32, for
example, is indeed a day optic, where a 4x40 gets you half an hour
farther into twilight before you have to shift to night vision and the
grainy monochrome image.  If you remembered to night vision and the
fresh batteries.

OTOH, 4x40 is bigger, more cumbersome, and usually more breakable.


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