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

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  1. T

    Resolution measurement 8x56 SLC

    Could we conclude then, that low longitudinal CA is the dominating factor in perceived central sharpness and contrast rather than SA? John
  2. T

    Resolution measurement 8x56 SLC

    Perhaps you should have qualified that as "perceived" resolution, but I'm with you there. And then these "assessments" are often hand-held on lower contrast targets. John
  3. T

    Resolution measurement 8x56 SLC

    Yes, a very reassuring result even if it vastly exceeds my visual capabilities. Perhaps the objective design profits from the more exacting requirements of a 15x binocular in the same line-up. John
  4. T

    Resolution measurement 8x56 SLC

    I have tried several times in the past to measure the resolution of my binoculars using an Edmund Optics USAF 1951 glass slide and a 3x12 Zeiss tripler but failed, firstly because of the diificulty in affixing the tripler behind the binoculars' ocular and secondly because my old eyes require...
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