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

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  1. Bird_Bill

    Pentax A*300mm

    Essentially same raw silica component.Production methods,coatings, etc then defining proprietary characteristics of piece. Both are absolute marvels of optical technology.
  2. Bird_Bill

    Pentax A*300mm

    Here's A*300/4 with a couple of vivitar 2x TC's that I removed the glass from to use as extension tubes from about 7 meters.About maximum focus with that much extension.Contacts for lens info on one TC is a gummed up, need to tear it down and clean it. This spring,my hummingbird rig will be "old...
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