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

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  1. B

    Odd EBay find

    The Nikon multicoated achromat is the size of a 62mm filter. It is actually about 700mm fl or 1.4 dioptre not 2/3 dioptre. I didn't realise how useful it is as a single lens telescope until fairly recently. I cannot remember which Nikon lens it was used as an accessory. Regards, B.
  2. B

    Odd EBay find

    Opticron do 4x12 monoculars for £34 and £99. Hilkinson 6x20 Quickscope focuses to 25cm. Metal. Small. £39.99 Regards, B.
  3. B

    Odd EBay find

    Looking at the binocular Russian version that comes in an oblong plastic white case. The length of each monocular half is 33mm. the objective is probably 17.5mm and the magnification about 2.5x. But it focuses at the front by rotation of each half of the binocular. So the magnification might...
  4. B

    Odd EBay find

    These are very common. I have the monocular and binocular versions. Galilean and tiny, but actually I haven't found much use for them. The monocular is so tiny, I suppose you might as well have one as it takes almost no room in the pocket. One of them has a strange bug inside it, but I leave...
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