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

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  1. YuShan

    Good Clothing?

    This surprises me. When hiking the Arizona National Scenic Trail and the Pacific Crest Trail, snakes were very common. Fortunately the Rattle Snakes give a clear warning well in advance. When hiking (and birding) the Bibbulmun Track in south-west Australia, Australian hikers warned me that I...
  2. YuShan

    Good Clothing?

    This is probably true (it's the usual advice). However, I do wonder... Birds have different colour vision than humans. We have rods (night vision) and three kind of cones, many birds have four kind of cones (no night vision) and see a larger gamut of colours, including wavelengths that we cannot...
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