Re: optics data

"Dirk" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> In article <[EMAIL PROTECTED]>, Simon Lee wrote:
> > Matteo choreographed a chorus line of high-kicking electrons to spell
> > out:
> >
> >> 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" ?
> >
> > The first number is the magnification, the second the diameter of the
> > objective lens.
>
> Is it "length magnification" or "area magnification"?  Ie does for
> example 4x mean 1 meter long object appears as big as 4 meter long
> object with naked eye, or does it mean that 1x1 meter square object
> appears as big as 2x2 meter square object with naked eye?


Typically it is a linear measure, not area.
That is, for 4x objects 1000m distant appear as if they were 250m to the
naked eye.

-- 
Dirk

The Consensus:-
The political party for the new millennium
http://www.theconsensus.org