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

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  1. R

    Nikon 12x40 CF WA 5.5º

    Hi, I have a Nikon 12x40 CF WA 5.5º bought in the 80s and I appreciate it very much for its great optical and mechanical quality. The E series, to which this model belongs, was the high range of Nikon in the 80s. The only shortcoming of this model is that it is not multicoated and its...
  2. R

    How to measure our own IPD

    Hello binocular friends. I suggest here a simple method of measuring our own interpupillary distance, using a caliper: https://sites.google.com/site/rchamon/home/augenabstand Cheers Rafael
  3. R

    Starlings attack a blue climber's nest

    Hello friends, with delight I have observed from my window how a couple of blue climbers prepared their nest into a round hole, about 5 cm diameter, that a woodpecker had made on a tree years ago. The blue climbers were carrying material for their nest. A few days later, starlings (larger in...
  4. R

    Cyanopica Pica

    Hello friends. In the area around Madrid, where I live, you can see sparrows, pigeons, blackbirds, magpies and other common birds. A few years ago blue magpies (cyanopica pica) appeared in large numbers. They are very beautiful and intelligent corvids, their head is black and their wings and...
  5. R

    Stereoscopic vision on birds

    Hello, I would like to comment a topic that I sometimes ask myself. It is related to the stereoscopic vision of birds. Most birds of prey have frontal eyes, so they can appreciate distances, something necessary to locate and easily catch their preys. This is particularly evident in nocturnal...
  6. R

    Hello from Madrid-Spain

    I am glad to belong to BirdForum now. I am a retired engineer with high interest in all Nature subjects. My experience in birding is scarce, but I hope to learn a lot in BirdForum. I have passion for binoculars. Cheers Rafael
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