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

Recent content by Rafael Chamon

  1. R

    7X42 Format.

    Hello, Pluto. I have several 7x binoculars, all porros. Among others, the Carl Zeiss Jena 7x50W multicoated that you describe. Also a Nikon 7x50 from the E series and a Nikon 7x35 from the basic series 'Sporting' (this one is optically excellent). I think the 7x35 combination (in porro type) is...
  2. R

    First binoculars: Nikon Vs Celestron

    Let me give a cue about the field of view of telescopes and binoculars: https://sites.google.com/site/rchamon/home/field-of-view-of-telescopes Cheers
  3. R

    Nikon 12x40 CF WA 5.5º

    Yes, those data correspond to the E series 8x30 multicoated model, mentioned in this thread. According to experts, the quality of this model is similar to that of the most modern 8x30 EII, which is among the best 8x30 porro models currently available. You can read a review here...
  4. R

    Nikon 12x40 CF WA 5.5º

    Thanks for satisfying my curiosity. Lately I also use my binoculars for the observation of birds in my environment, which are magpies, iberian magpies (cyanopica cooki), starlings, bee-eaters, blackbirds and pigeons. Cheers Rafael
  5. R

    Nikon 12x40 CF WA 5.5º

    Thank you John, superb information. Yarrellii: I wonder why you got rid of your 12x40 E multicoated. In my case I tend to keep the good specimens that I find because I am a (moderate) binoculars collector. Cheers Rafael PS: Yarrelli: after posting the above I found the post where you offer...
  6. R

    Nikon 12x40 CF WA 5.5º

    Thank you very much for your quick responses. I also have the Nikon 8x30 E multicoated, which is my best 8x30 among several I own, but I have never seen a 12x40 multicoated. I'll try to find one. Best regards Rafael
  7. 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...
  8. 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
  9. R

    Starlings attack a blue climber's nest

    Yes, nuthatch, sitta europaea. I didn't know the English name and I just translated the Spanish name with the Google Translate. Now I know, thank you. Rafael
  10. 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...
  11. R

    Cyanopica Pica

    Cyanopica cooki Thank you for the correction Cheers Rafael
  12. 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...
  13. R

    Stereoscopic vision on birds

    Thank you Nutcracker for your reply. Probably birds have at least two foveas on their retine. The fovea is the area of the retine with greater visual acuity. Because some birds stare laterally at distant objects and frontally when pecking food. (It's just an assumption). Rafael
  14. 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...
  15. R

    Peculiar 7x50

    Hello: both are optically and mechanically very good. Main differences are: The 7x50 is a big instrument with a stable and moderate field of view, very pleasurable to handle, though heavy to transport. The 8x30 is agenerak-pourpose, small instrument (perhaps too small for big hands), having a...
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