On Mon, Dec 02, 2002 at 07:32:08AM -0800, AG Schnozz wrote:
> >If this was the LUG, there would be no stopping after a
> >comment like that.
>
> I'm still not satisfied.
>
> 50mm = 1x
> 100mm = 2x
> ???mm = 3x
> 200mm = 4x
>
> If these are the "standard" multiplication factors regarding
> general "magnification" of 35mm cameras, then why is 3x 135mm
> and not 150mm?
It is because trigonometric functions (sin, cos, tan) are not
linear functions. ;-)
Your last question was a bit different. The 135mm answer was
given with respect to the angel of field.
When you ask with this way, I'd guess you refer to the
size of your subject on the film at a given distance.
Under this magnification aspect the answer surly is 150mm
is in the middle.
Frieder Faig
P.S. when you refer to the covered field area, the 141mm
answer is the one you want.
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