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

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  1. C

    USA, Maryland, January, similar to downy/hairy woodpecker but entire top of head red

    We get hairy & downy woodpeckers at the suet. This guy is girdling my holly tree. It is two stories high & maybe 30" away from a second story window. At the height of the window he is making rounded rectangles 2cm x 2-4cm, not very deep, all around, for a vertical span of say 8" - its a thin...
  2. C

    how old is this Swarovski Habicht DV 7x42?

    What does the DV stand for? see https://shopgoodwill.com/item/165288232
  3. C

    Birder model w/ "National Audubon Society" & a bird on right prism cover

    What's the quality level of these? When were they produced? Where?
  4. C

    Got a list of FOV by model? & Actual minimum IPD? & close focus distance?

    I'll start. For min IPD, I measure from one inner edge to the other, trying to look straight down with one eye to line it up, then straight down on the other side. Not sure how much individual variation there is on the hinges touching. No need to try to visualize the innermost "ring" because...
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    Audobon Society endorsement in 1930 !

    SEE: elkcub on Jan 13, 2012 birdforum.net/threads/old-tecnar.220015/#post-2336493 GOTTA MAKE IT STOP EXPANDING THE URL TO SHOW THE IRRELEVENT TEXT. attached a 1930 advertising paper: https://www.birdforum.net/attachments/s-a-1930-stadium-pdf.364745/ on pg 17, see the Nighthawk 7x24 ...
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    Chronology of focus wheel styles & eye cup styles?

    So Swift focus wheels had long striped on the axle, fat striped on the axle, wheel in front of the cover... Anybody have a table describing these changes chronologically? Did changes happen at about the same time all across the brand as a style decision?
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