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

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  1. K

    Corrector lens for a binocular

    I have always preferred to use binoculars without glasses on, but for a few years now my left eye has deteriorated with increasing astigmatism and some other aberrations to a point where it is compromising the view more than I'm willing to accept. When I had new glasses made this summer, I asked...
  2. K

    10x42 IS L with a finnstick

    As promised on another thread, here will be a few photos showing how you can utilize the perfectly positioned tripod attachment thread on the underside of the L and the 15&18×50 Canons
  3. K

    Canon 10x42 IS L Tripod vs hand-held vs IS testing

    Today I had some time to start my part of the hand-held vs tripod-mounted vs Image-stabilized resolution testing. For the sake of clarity, I decided to start a new thread rather than post this into the existing 8x25 IS thread. David, maybe you could summarize your tests from that thread and post...
  4. K

    Canon 10x42 IS L cutaway view

    Here, so folks can compare the optical configuration with that of other alphas. http://cweb.canon.jp/binoculars/10x42li-spsite/s_n/index.html This takes you to a "special site" for the binocular. To get the cutaway, 1) skip the annoying animation by clicking "skip," 2) click 3rd from top red...
  5. K

    SLC 8x,10x & 15x56 review on CN

    Just a heads up on a thread on Cloudy Nights where Erik Bakker has posted a nice and detailed review of the big SLC series, comparing it to 56 mm Zeiss FL's. The actual review post is pretty far down the thread, posted yesterday while the thread was started a while back. Lots of good photos too...
  6. K

    My test & review of the Swarovski ATX 30-70x95

    Hi all, My rather lengthy test and review of the ATX scopes is now posted on the Lintuvaruste website. Here's a link to the index page of the reviews. The ATX story is the last one on the list. Sorry, no pictures. http://www.suomenlintuvaruste.com/product_catalog.php?c=88 Cheers, Kimmo
  7. K

    Tried out the TE-11WZ wide zoom on 883

    On Monday I tested the new Kowa TE-11WZ zoom on an 883 scope. It is not much bigger than the previous zoom, weighs 380g or about 55g more than the old version. I measured the eye-relief as 16mm/25x, 15mm/30x, 14mm/40x, 15mm/50x-60x. This is measured from the plane of the eyecup twisted in, not...
  8. K

    Nikon SE II

    I'm a bit surprised that the SE fan club did not jump on this yet, but in the wow-factor thread, Gijs slipped the words " ... price of the new SE II's ..." So, did a quick search. Found this: http://www.optics-trade.eu/shop/en/shopby/binoculars_series-standard.html Nitrogen-purged and...
  9. K

    New Birdwatching guide for South-East Brazil

    New Birdwatching guide for South-East Brazil This is just to inform people that there is a new guide out that offers birding site descriptions for 50 sites throughout South-East Brazil, travel instructions, photo-illustrated species descriptions for the 471 species recorded in the Agulhas...
  10. K

    New Birdwatching guide for South-East Brazil

    This is just to inform people that there is a new guide out that offers birding site descriptions throughout South-East Brazil, travel instructions, photo-illustrated species descriptions for the 471 species recorded in the Agulhas Negras area, as well as a checklist for all the bird species of...
  11. K

    New Twentse test of Leica Apo-Televid 82

    For those interested and able to decipher Dutch, Jan Meijerink has posted a test report of the new Leica Apo-Televid with the 25-50x Asph. zoom together with the new Swarovski ATM 80 HD + zoom. www.tvwg.nl Go to "testrapporten" Kimmo
  12. K

    Twentse test of ATM 80 HD

    For those interested and able to decipher Dutch, Jan Meijerink has posted a test report of the new Swaro with 25-50x zoom together with the Leica Apo-Televid 82 + zoom. www.tvwg.nl Go to "testrapporten" Kimmo
  13. K

    Hawke, Zen-Ray ED field of view

    Thought I'd post a query to those forum members who own or have access to one of these Chinese ED-roofs. I currently have for testing one sample of the Hawke Frontier ED 8x43, which has a stated field of view of 426 feet/1000yds or 8.2 degrees. As part of my usual testing procedures, I measure...
  14. K

    Alula reviews are available again

    Just to let you know, Lintuvaruste, the bookstore and birding equipment store affiliated with Birdlife Finland, has now posted most of the old Alula reviews also in English. You should find them here: http://www.lintuvaruste.fi/hinnasto/optiikkaarvostelu/optics_1_topbinoculars_GB.shtml...
  15. K

    Alula reviews are available again

    Just to let people know, Lintuvaruste, the bookstore and birding equipment store affiliated with Birdlife Finland, has now posted most of the old Alula reviews also in English. You should find them here: http://www.lintuvaruste.fi/hinnasto/optiikkaarvostelu/optics_1_topbinoculars_GB.shtml...
  16. K

    Kowa 883 quality consistensy tested on Twentse website

    Jan Meijerink has just posted the second installment of his "quality spread in birding telescopes" series, this time featuring 6 specimen of the Kowa 883. You can find it at www.tvwg.nl under testrapportten and then telescopes. Yet another good reason to learn some Dutch... Just to summarize...
  17. K

    Make your own simple sight (aiming) device for telescopes: illustrated instructions

    Here are instructions and illustrations for making an effective, simple, quick and cheap aiming device suitable for any angled-view telescope. The instructions consist of an article which I originally wrote for Alula and which were later also published in Birding, and a series of illustrations...
  18. K

    Zeiss sample variation test by Jan M.

    Jan Meijerink has tested side-by-side five samples of the Zeiss 85 FL, and has now posted the results on www.tvwg.nl He hints at this being the first in a series of similar tests. You'll find it under "testrapportten" "telescopes." He includes digital photos of a resolution target through all...
  19. K

    Best tripod test thus far

    This is to inform all interested that the indefatigable Dutch birding optics expert Jan Meijerink has posted beautifully conducted tripod and head tests on the Twentse vogelwerkgroep site: http://www.tvwg.nl/ You will find it under "testrapportten," one of the site tabs on the left of the main...
  20. K

    How do we define one arcsecond resolution?

    How one arcsecond resolution is defined Prologue A second of arc or arcsecond is a unit of angular measurement which comprises one-sixtieth of an arcminute, or 1/3600 of a degree of arc or 1/1296000 ≈ 7.7×10-7 of a circle. It is the angular diameter of an object of 1 unit diameter at a...
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