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

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  1. Surveyor

    Here are the new modular Swarovski scopes

    Thanks Kimmo, it has been so long since I have seen measurable on axis astigmatism that it did not even come to mind until you mentioned “on axis” then I immediately knew what you meant.
  2. Surveyor

    Here are the new modular Swarovski scopes

    Kimmo; I actually find astigmatism troublesome before I can see it in star tests. I am not familiar with scopes, only visiting here because nothing new in the bino forum and the topics are a lot more interesting. I have attached an example of what I find from a test of the ZR bino from...
  3. Surveyor

    Here are the new modular Swarovski scopes

    Another spec. that I failed to mention is that a minimum exit pupil size of the booster be 0.8 mm. I know I fairly routinely violate that one. Henry, I take it to mean that that you set best focus for the group of four directions in the center field.
  4. Surveyor

    Here are the new modular Swarovski scopes

    Kimmo, Henry, Steve and all; I have attached the description for a resolved element from ISO 14490-7, along with their recommended target group. A group/element is resolved as long as you discern the direction of all parts of the element without refocusing in the center field. Further down in...
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