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

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  1. Troubador

    Binocular Evolution I: Field of View

    The percentage difference between two binos, of fov at 1,000 whatevers, is the same at 10 whatevers. So if bino A has a fov of 10% bigger than bino B at 1,000 whatevers, Bino A will have a fov 10% bigger at 10 whatevers. For example two of my favourite binos are Zeiss SF8x32 (fov 155m at 1,000)...
  2. Troubador

    Binocular Evolution I: Field of View

    Absolutely agree my binos are there to provide me with 8x magnification (sometimes 10x). A more generous fov simply means I get 8x magnification of a bigger slice of the world every time I look through them. Lee
  3. Troubador

    Binocular Evolution I: Field of View

    I was exactly the same, fixated on magnification and went straight for a 10x model. After 17 years I switched to 8x and have never regretted it. I do have a 10x available but rarely use it in the field. Lee
  4. Troubador

    Binocular Evolution I: Field of View

    I use two different binoculars depending on the nature of the coast we are visiting on that day. SF8x32 with 155m fov and Trinovid HD 8x32 with 124m fov. The SF has a fov area 56% bigger and I simply find it easier and quicker to scan an area with the SF than with the Trinovid, which I value...
  5. Troubador

    Binocular Evolution I: Field of View

    Wouldn't you need to shine a light through the objective lens and out of the eypieces, so that it follows the light path used by the light you use for observation? Lee
  6. Troubador

    Binocular Evolution I: Field of View

    My understanding is that it is not possible to simultaneously control all distortions/aberrations, because as you improve one, you make another worse, so it is not so much that the remaining distortions were considered 'desirable' by the engineer, more a case of these distortions being the...
  7. Troubador

    Binocular Evolution I: Field of View

    Going back to Tenex's excellent introduction to this topic, here are the reasons why I favour wide fields of view for much of my bino use. The remaining part of my bino use consists of close-focus work which is an entirely different topic. Bear in mind that my binocular use is mostly among the...
  8. Troubador

    Binocular Evolution I: Field of View

    Didn't Nikon's E II 8x30 have 154m @ 1km? If so, Zeiss's SF 8x32 having 155m seems the answer to your prayer. Or not? Lee
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