Zoom Question
Jim Townsend wrote:
All things being equal.. The longer the focal width, the narrower the
field of view and the closer objects appear.
Of the two lenses you listed, the 8-80mm lens provides the longest
focal length and will provide the greatest magnification.
Note that the X in zoom lens doesn't represent the magnifying
power the way telescopes and binoculars do.
The 'X' represents the difference between maximum and minimum
focal length. The X of a zoom lens is determined by dividing the
maximum focal length by the minimum.
72 / 6 = 12x (from 6mm you can increase the focal length 12x)
80 / 8 = 10x (from 8mm you can increase the focal length 10x)
If they made a 2mm to 50mm lens, it would be a 25X lens, but
wouldn't have near the magnifying power of the 8-80mm 10X lens..
Thanks Jim
That's cleared it up.
--
Gareth Slee
Stupid gravity!
Homer Simpson: (Falling out of treehouse)
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