30Jan/101
What is the difference between a camera’s optical zoom and a magnification in a binocular?
For e.g. an 8x optical zoom in a camera and an 8x magnification in a 8x40 binocular?? Is there any difference between these 2, or are they the same??
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January 30th, 2010 - 21:48
no, they are not the same. When a camera says it has 8x optical zoom, you must first known the effective highest focal length. If the widest is 35 mm 8x that is 280 mm. A camera of about 105 mm is equivalent to about 1x of a binoculars, so 8x in binoculars is about 840 mm in a camera. It is not completely so simple as that though because digital cameras today are 10 meg pix and even more. That means that you can blow up an 4×6 picture into 8×12 or even larger. You do not see such a large picture through binoculars. In fact some binoculars have a somewhat restricted field of view. What I am attempting to say is that by blowing up the photo you might possibly get as large an image as you might see through the binoculars.