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

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  1. T

    Odd EBay find

    My bad. Sorry. Regards, John
  2. T

    Odd EBay find

    Wow, a 2/3 dioptre achromat! What's the diameter and for which lens was it intended? Regards, John
  3. T

    Odd EBay find

    Superficially these remind one of the monoculars which could be prescribed for the visually impaired to aid them in daily life - reading street signs etc. The short length and "large" 17,5 mm objective suggests that they must be Galilean as Binastro states. The above monoculars though are...