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

Recent content by jan van daalen

  1. J

    Docter (ex-Zeiss) Classic porros

    Just send it to Wim de Boer www.dekijkerspecialist.nl and you'll get it back as new. Jan
  2. J

    Best marine binoculars?

    I was told by Zeiss that the reason was economics. It was to expensive to built. Regarding the bin on the auction. According to the given specs the built period would be between 2000 and 2010. Unfortunately it is Made in West Germany but it is a T* so the building period lies between '78 and...
  3. J

    Baby S

    AFAIK the first week of May
  4. J

    Best marine binoculars?

    Currently one for sale on the catawiki auction site (binoculars) the Zeiss 7x50 T* West Germany in mint condition. Last bid is 630,00 dollar/700,00 euro. 1 day to go. Jan (who has no part in this)
  5. J

    CZJ T3M

    Just to be complete, from1987 it is marked T*P.
  6. J

    New but probably wrong insight about lowlight

    You're quite right. The eyeball moves (so the pupil moves). Sorry for the confusion. I'm just Dutch. The main point is that the exitpupil from the binocular does not move. So when the pupil (while moving) has the space of, for example, 7mm from a 10x70 but is by itself just 4mm it collects more...
  7. J

    New but probably wrong insight about lowlight

    Regardless the size of the pupil, the pupil moves (the visible size of the pupil is decided by the Iris). Otherwise we should only see the object straight ahead of the view.
  8. J

    New but probably wrong insight about lowlight

    The range of movement is always the same. The pupil moves. It can be 3mm or 6mm in diameter. When it moves it moves regardless its diameter, something the Iris is responsible for.
  9. J

    New but probably wrong insight about lowlight

    Reinier, What you have to take in account is the fact that the humans pupil doesn't stand still but moves tens of times per second. In theory will a 8 and 10x42 be the same when the pupil is 4.2 at the max. Still the 8 times looks brighter because of the fact the 'moving' pupil catches the...
  10. J

    Eclipse

    Nice nails Jan
  11. J

    Trinovid hype

    Yes it gives a interesting glimp behind the scenes (at least for me).
  12. J

    Trinovid hype

    For those who are interested I included the complete interview.
  13. J

    Best marine binoculars?

    Nice job. Did you cut it by yourself? Jan
  14. J

    Trinovid hype

    In October 29 1999 Peter Abrahams and Richard Buchroeder interviewed David (died in 2005 on the age of 91 years) and Nancy Bushnell in which both gave an insight in the binocular developement after 1947. I got a transcript of that interview from Peter and it shows that in 1948 David Bushnell met...
  15. J

    Best marine binoculars?

    You mean the bitch in leather or the one in rubber dressing? Jan
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