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

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  1. WJC

    Astigmatism as an Aberration in Optics

    "Along with field curvature (not to be confused with distortion) . . ." Yeah, John, I wanna see you pull THAT one off! Actually, you probably can! I need to watch what I say 'til everybody knows my sick humor as well as you do. The folks over here on BF seem a cut above the average guy over on...
  2. WJC

    Astigmatism as an Aberration in Optics

    A good (over simplified, perhaps) example of astigmatism may be seen at night in your car's windshield. The lights in on-coming cars may streak parallel to the road, yet when they reach a certain proximity to your car, the line instantly becomes perpendicular to the road. This is like...
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