One thing that I have to add as a drawback is parallax. If you take a picture and your camera is perfectly perpendicular to the glass, you're OK but if you try to take a picture at an angle (i.e., following a moving fish), you get distortion and keystoning and stuff like that.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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