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

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  1. Pinewood

    Underappreciated Old Porros

    A problem with old Porros, which I have encountered, is that the after forty or so years the balsam discolours, giving a warm tone to the view. I have seen Binuxits made in 1950 and 1951. The former had the problem, the latter did not. I am told that Zeiss (West) glasses of the 1950's and...
  2. Pinewood

    Underappreciated Old Porros

    On fair days, I like a fifty year old Leitz 8x30 Binuxit. As Bawko wrote, the Porros are subject to shocks, therefore you should inspect them for collimation, every few years or when you get eye strain, or the view has deteriorated, even a little. Yes, I have modern roof glasses, but even the...
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