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

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  1. M

    Dioptre Setting: Fallacy and Fact

    1. Cover the right objective lens. 2. Look through the binocular and focus with the focus wheel. 3. Uncover the right objective and cover the left objective. 4. Unlock the diopter adjustment and focus with the diopter wheel. DO NOT TOUCH THE MAIN FOCUS ADJUSTMENT! 5. Lock the diopter...
  2. M

    Dioptre Setting: Fallacy and Fact

    This is probably the best explanation I recall ever reading. (Or that I recall offhand, but my memory gets a bit worse every year)
  3. M

    Dioptre Setting: Fallacy and Fact

    I don’t understand why there is such confusion over simply adjusting for any difference between one’s two eyes which affects the focus setting. A binoculars is, by definition, an instrument designed to be used with both eyes. If the two eyes differ sufficiently, it will be impossible to bring...
  4. M

    Dioptre Setting: Fallacy and Fact

    Henning; Thank you for that, as I did not know Helmholz addressed that. If one has had cataract surgery, and therefore has replacement implant lenses (as I have) one has, of course, zero accommodation. Cheers! Richard It’s much easier to have a discussion if people define their terms and...
  5. M

    Dioptre Setting: Fallacy and Fact

    I think the relaxed, unaccommodated (without arguing what that “means”) human eye will be focused on infinity. A relaxed, unoccommodated eye is defined as an eye with the ciliary muscles which control the curvature of the OEM lens relaxed and in a state of zero contraction, so that the lens is...
  6. M

    Dioptre Setting: Fallacy and Fact

    As far as I know Bill, I have zero ability to accommodate, since I have implants which have replaced my OEM lenses on both sides. I do, however, fiddle with the focus mechanism in an attempt to squeeze that last bit of detail out of the image. It’s probably more a nervous habit than anything...
  7. M

    Dioptre Setting: Fallacy and Fact

    Nothing is so straightforward that it cannot be made complex by one who does not understand it.
  8. M

    Dioptre Setting: Fallacy and Fact

    I find this discussion puzzling, because the diopter setting compensates for any difference between one’s two eyes. That viewing objects at different distances would change this difference seems unlikely to me. Things are more complicated when we don’t understand them.
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