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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

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  1. D

    7X42 format.

    We should take a poll on how many people use each magnification for birding. 7x, 8x or 10x. It would be interesting.
  2. D

    7X42 format.

    http://www.astronomyforum.net/telescope-forum/227352-afov-vs-tfov-eyepiece-explanation-pictures.html
  3. D

    7X42 format.

    A lot of the manufacturers use different methods to compute AFOV. So it becomes hard to compare different binoculars across the board. I use the simplified method of FOV(Degrees)XMagnification=AFOV(Degrees). So the SV 8x32 is 8X8=64 Degrees AFOV and the Nikon 7x42 EDG is 8X7=56 Degrees AFOV.
  4. D

    7X42 format.

    IMO there is. But like dries1 said in his post try them yourself. Some people like them. I notice quite a bit of difference in moving up or down 1x magnification in binoculars. I have tried many 7x binoculars over the years and I always come back to 8x and 10x. I always feel the 7x are too weak...
  5. D

    7X42 format.

    7x isn't that popular for birding and not many manufacturers are making them anymore because the majority of people have decided it isn't enough magnification and they don't sell well even with all it's advantages. There was a comment on Bird Forum that a Zeiss Rep said they sold one 7x42 in two...
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