I was looking for a peep hole, and the store guy pointed me to "wide angle vieweres." They say that there are three kinds, one with a 160 degree fied of view, one with a 180 degree field of view, and one with a 200 degree field of view, but all of the packages showed a guy looking through a peephole, with about a 90 degree angle field of view labeled differently according to the package.
200 degrees? Doesn't that mean you could see backwards a little bit? Do I just not understand how these are being measured?
2006-10-06
19:01:05
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2 answers
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asked by
ye_river_xiv
6