Re: 800-1200mm telephoto lens - good enuff for Tikaboo?


Message posted by gary on May 26, 2002 at 0:06:44 PST:

Unless this is some sort of folded optics, you'll have to strap that beast to your back. Remember, if it really is 1200mm, then it over 3 feet long! If it is folded optics, I suspect the performance will not be very good. The problem is the mirror puts a large "hole" in the lens aperture, leading to a loss of sharpness.

You can search the net for "dawes limit" to understand how the size of the lens (aperture) effects sharpness.


In Reply to: 800-1200mm telephoto lens - good enuff for Tikaboo? posted by Brian on May 22, 2002 at 20:01:47 PST:

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