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

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  1. kimmik

    Binocular Evolution I: Field of View

    I wouldn’t call wide fov a fad, as the current fov race is in compact roof format, and furthermore adds the challenges of internal focusing, and good edge correction. Not having owned a vintage ultrawide, but the photos suggest substantial weight, and externally focused design.
  2. kimmik

    Binocular Evolution I: Field of View

    That sounds like an excellent model to have next to an EL 8x32 to help elucidate the root cause of complex distortion. Especially if an internal schematic was found. I do already notice several potentially relevant differences on spec sheet, including weight, FOV, ocular lens diameter, eye...
  3. kimmik

    Binocular Evolution I: Field of View

    In a system with 12 optical elements, 10 of which produce CA, coma, petzval curvature, astigmatism, distortion, spherical aberration, it isn’t surprising that residual aberration of anything exists. Not having zemax and the full optical formula of any model in particular, I am presumably like...
  4. kimmik

    Binocular Evolution I: Field of View

    The nuance here, is that distortion is both deliberate, as well as accidental. Controlling another aberration may have unwanted effect on distortion, and it may not be uniform. I don't think Henry was suggesting that complex distortion was a design goal, more a design limitation to satisfy...
  5. kimmik

    Binocular Evolution I: Field of View

    Maybe a little inaccurate to say AMD reverses, it just progressively increases as you approach the edge, and moustache is the result only if the increasing AMD is more rapid near the edge than midway. If the increasing AMD was consistent, then you get simple pincushion or perfect straight line...
  6. kimmik

    Binocular Evolution I: Field of View

    Cool comparison, Komz and Kowa look like curved field with low pincushion, so then all 4 combinations of field curvature/AMD do exist in current binoculars.
  7. kimmik

    Binocular Evolution I: Field of View

    Optically NL replaced both SLC and EL, with AMD distortion somewhere in between, while maintaining flat field. The NL physical design is completely new and is neither EL nor SLC. A new 70° AFOV SLC would be better renamed SLW: Option 1. The feature of "small light compact" will suffer to...
  8. kimmik

    Binocular Evolution I: Field of View

    To design a wider FOV bino one can do the following: 1. faster objective, then correct the aberrations with all your alpha skill 2. bigger prism and eyepiece, until it no longer fits in your desired body shape 3. longer body to move the prism as far back as possible, for a larger image circle...
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