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

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  1. K

    What's wrong with the Zeiss Harpia??

    A telescope, like a binocular, is an focal device when working with the human eye. DOF is only affected by magnification, not exit pupil diameter. There are a number of threads on this topic, which regularly creates confusion because with camera lenses the situation is different.
  2. K

    What's wrong with the Zeiss Harpia??

    The short answer is that there is nothing wrong with the Harpia. The things you mention as negatives are true, yes, but not significant for daily use, and don't make the scope as a whole worse than other top scopes. The super-wide viewing angle that remains subjectively the same throughout the...
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