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

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  1. has530

    8-16x40 XL Zoom...One Binocular to Rule Them All?

    I got them on a tripod today and measured the AFOV using this method and got 41* @ 8x, 47* @ 12x, and 53* @ 16x. Much more in line with what you measured and showing roughly linear increase in AFOV with magnification (glad to see we can make agreeable measurements!). I think the initial...
  2. has530

    8-16x40 XL Zoom...One Binocular to Rule Them All?

    My method likely overestimated by a bit. I used a tape measure 15 feet away to measure true field of view and then multiplied by magnification using the simple formula to get afov. My measured FOVs were 5.2° @8x, 5° @10x, and 4.0/4.1° @15x. Using the tangent formula comes out to 40°, 47°, and...
  3. has530

    8-16x40 XL Zoom...One Binocular to Rule Them All?

    Here they are second from the right along with my Canon 15x50, Meopta Meostar 8x32, Bushnell Legend M 8x42, Zeiss VP 8x25, (zoom XL), and Sears Discoverer 7x50 10° (picture posted in "what binos did you use today" thread) I am headed out birding now but can weigh them when I come back. They...
  4. has530

    8-16x40 XL Zoom...One Binocular to Rule Them All?

    Earlier this year I found a good deal on a clean pair of the Nikon XL zooms. I had always been curious about these as conversations about zoom binoculars generally go "all zoom binos are bad...except the Nikon XLs". I have to say, they are very impressive optically and mechanically. The focus...
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