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

Recent content by ksbird/foxranch

  1. ksbird/foxranch

    USA binocular repair businesses

    I have a wide variety of binoculars that need internal cleaning or repairs. These range from US military M19s to older Leitz and Swaro porros. I'll likely need to ship them unless there is a good place in Kansas City, so I would like recommendations for binocular businesses only in the lower 48...
  2. ksbird/foxranch

    eye color sensitivity differences affect quality judgments

    Here is a story about how varied our color sensitivity is. I printed out the web page below to show to my ophthalmologist during a recent visit http://rstb.royalsocietypublishing.org/content/364/1531/2957.full#ref-10 when I asked my ophthalmologist what the following phrase meant: "in the...
  3. ksbird/foxranch

    eye color sensitivity differences affect quality judgments

    !st of all the color sensitivity "humps" we see on "standard carts" are averages, not fixed points that all eyes adhere to. Some people have 4 color sensitivity humps others have three. No one is likely to have exactly the same center frequency for their 3 or 4 sensitivity humps as anyone else...
  4. ksbird/foxranch

    eye color sensitivity differences affect quality judgments

    I've been hanging around Cabelas (and 3 other optics stores) recently and the Kansas City store has recently redone their optics counter. This made it easier to browse my way through the optics candy they offer. I was comparing a variety of binoculars of the same design but with different...
  5. ksbird/foxranch

    Vintage binoculars, what is good?

    Thanks to Hermann, I did get a reply via birdforum email from someone who was unhappy with a current bin FOV for a Nikon Action Extreme 7x35. IMO Nikon is just afraid tey will sell fewer roofers if they make a wide angle version of the Extremes. The eyepiece needed is not that mush more...
  6. ksbird/foxranch

    Fan Tao's website archived

    Write to Holger Merlitz and he should know. Holger is in Asia and Fan Tao was a good friend of his. I know that when Geocities closed, I had to find homes for many of my web pages elsewhere. It could be that simple.
  7. ksbird/foxranch

    Vintage binoculars, what is good?

    I am back for a short time before the pear harvest. I own a pair of the above mentioned 9x35 Stellar brand porros and they are very good. They actually made my grab-&-go shelf by the back door because there aren't many small-ish 9xs (9x63s don't count), and they have a very wide FOV. The old...
  8. ksbird/foxranch

    Yukon Optics

    I mentioned the Yukon porro binoculars because I have had very good luck with them. The 7x50W I mentioned may have been a typo because the old Zeiss Jena model was the 7x50W Jenoptem. The model I have is the 7x50WA Futura. I also use the 12x50WA on a regular basis and just recently have been...
  9. ksbird/foxranch

    Columbia Malheur 10x32 Flourite

    I'm not sure that the misleading labels in the Malheur 10x32 came about because the top people at Kruger don't know what they are talking about. Mark Thomas is an experienced optical engineer, with over a dozen optics patents to his name (you could contact Kruger to get patent numbers and/or...
  10. ksbird/foxranch

    Columbia Malheur 10x32 Flourite

    I exchanged emails with the owners of Kruger Optical, and they agreed that the Chinese marketing blab, using words like "Fluorite" and "APO" were beyond the pale, and not noticed by Kruger's chief optical engineer, who assumed all "Marketing BLAB, was filtered thru the "cynicism algorythm". But...
  11. ksbird/foxranch

    seek European info about Sotem bins and Essenbach Consul 10x40 bins

    Is it really possible that the Eschenbach Consul 10x40 sold so poorly in Germany that no one know anything about this bins? bOr is the crisis of weather problems shutting down responses. We have had a cold/blizzard weather config for the century here in Kansas for a few days (-10F PM [--23.5C]...
  12. ksbird/foxranch

    seek European info about Sotem bins and Essenbach Consul 10x40 bins

    I have the chance to buy a pair of Essenback 10x40 Consul bins from Germany. They are the fully multicoated porro model that a friend bought in Germany. They don't say made in China, but look like Chinese product in spite of All-German descriptive language engraved on the body. They claim to be...
  13. ksbird/foxranch

    Columbia Malheur 10x32 Flourite

    I guess there is something I don't understand about how Mark Thomas and the Malheur 10x32 binocular. How can he be so much smarter than other optical designers that he is able to design of a system of binocular lenses in the Malheur 10x32, such that the performance is obviously better (in my own...
  14. ksbird/foxranch

    Columbia Malheur 10x32 Flourite

    I am not sure why the simple green-laser test used by other people who post on this forum was unable to detect the Fluorite glass (or "ED glass" depending on your definition) used in the Kruger/Malheur optics. But Mark Thomas, the president and chief optical engineer at Kruger Optical provided...
  15. ksbird/foxranch

    Columbia Malheur 10x32 Flourite

    Cesar, thanks for making your point about the Malheur's size. These are really tiny bins in my hands. I'm 6'5" tall and was surprised when I first tried to use them. If there is some new kind of roof prism developed by Kruger for this bin, then the focal length wouldn't have to be shorter, but I...
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