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

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  1. H

    My First Star Test

    This is the thread with lots of star-test discussion and photos. https://www.birdforum.net/threads/any-customer-review-of-new-tsn-99.414177/
  2. H

    My First Star Test

    The "high" focus photos appear to show focused star points smeared into star trails from too much vibration and/or a shutter speed that is too low. The defocussed images are much too far out focus to show any diffraction rings. The most useful photos would be defocussed images with only about...