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

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  1. J

    Let's talk PORROS!

    Hi Herman, I observe very small, finely detailed objects (cones of conifers, last dried up flowers of roses) and swivel the binoculars so that the barely distinguishable fine details (scales of tree drops, petals of dried up roses) at the edge of the field of view start to become blurred. I...
  2. J

    Let's talk PORROS!

    Good morning Hermann, thank you for your comment. Would you please compare the sizes of the sweet spots? Maybe choose 2 observation objects that just fit into the sweet spot? Thanks in advance. Best regards. Jessie
  3. J

    Let's talk PORROS!

    Has anyone ever compared the Swaro Habicht 7x42 with a Nikon Action EX 7x35? Just for fun and for possible insights. The difference in objective lens diameters is quite unimportant, both have twilight suitability, the 7x35 has twist-up eyepieces for eyeglass wearers, the 7x35 is at least...
  4. J

    Let's talk PORROS!

    Also a porro: https://www.ebay.de/itm/Russian-ARMY-RANGEFINDER-EM-61-About-1960-1970-Rare/224286393619?hash=item343882c513:g:TAQAAOSwk4JfnzDi Because wide adjustable stereo base (better parallax) I would like to have a look. (Stereo base is a technical term used in audio technology.) Dennis...
  5. J

    Let's talk PORROS!

    Thank you very much Henry. I will repeat the test. I used 2 coffee cups to make it easier to see a deviation from the circular shape of the coffee cup at the edge of the field of view by direct comparison with a circular appearing cup at the centre. Based on your hint, I also think that...
  6. J

    Let's talk PORROS!

    Hello Henry, your link (2nd picture) shows me an angular distortion image from a wide angle instrument with zero rectilinear distortion. I assume that angular distortion is the same as barrel distortion and is overcompensated by a pincushion distortion calculated by the designer to the desired...
  7. J

    Let's talk PORROS!

    Thanks, Henry. Your answer is very helpful. Jessie Addendum: I wrote in thread "Horizon II", it's a pity that I didn't know the document you linked: https://www.telescope-optics.net/eyepiece1.htm
  8. J

    Let's talk PORROS!

    Hi Henry, what do you mean by that? Do you have a link to a good explanation? I know only the popular terms to distinguish the distortion: pincushion (intended design), barrel (unpopulary for bins) and combinations thereof (for instance unpopulary "mustache" shape). Jessie...
  9. J

    Let's talk PORROS!

    A beautiful story. Here I laughed out loud: For a non-native English speaker, the sentence is easy to translate literally and sounds funny - but the real meaning: I don't care at all. It can also be translated into somewhat heartier German. :) Bill, stay healthy and tell your (life) stories...
  10. J

    Let's talk PORROS!

    Gijs, DDoptics offers only the older Kite Lynx variety under its own name. This is fine (already tested briefly, especially what it has to do with the stray light criticized in forums) but the eyecups are too easily accidentally adjusted. The new Kite Lynx HD+ have twist up eyecups. Therefore, I...
  11. J

    Let's talk PORROS!

    Mike, thanks. Good to know. Thats a plus for 10x35 EII. I use a contoured strap from manufacturer Niggeloh. Jessie https://www.alp-jagd.at/NIGGELOH/Niggeloh-Fernglas-Gurt
  12. J

    Let's talk PORROS!

    Thanks Chris. Can you tell which of the Nikon E II (8x30 vs 10x35) sways less when carried in front of the chest? The side brackets (eyelets) for the strap are not supposed to be positioned that conveniently. Is the 10x35 in this relation better because longer tubes? Jessie
  13. J

    Let's talk PORROS!

    Thanks Gijs. The Netherlands is far away, but otherwise with pleasure. But sometimes I have holidays. I'll just do it like this: I'll save a bit more money and then order the Nikon and the Kite at the same time and compare them immediately and simultaneously. Fast and best possible individual...
  14. J

    Let's talk PORROS!

    Hello Gijs, now I have saved some money. Old military or civilia binoculars I will better not buy, there I would have to add service costs and would be yet only for the shelf for nice view. I now consider format 8x30 Nikon EII, Kite Lynx, Opticron Traveller, Nikon MHG. Maven B3 is hardly...
  15. J

    Let's talk PORROS!

    Why? Your answer: < locked > Why? Answers from your wife, give her your account data: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. necessary additions to the prepared list from your wife: Please turn the page or start a new thread. :)
  16. J

    Let's talk PORROS!

    sidpost, post #132: Thank you very much for the detailed explanations. To write such a long text to another person, to give him so much time, means a great respect for him, for other people. For this again a very big thank you. I can't say much about it, it is your color and life story, I am...
  17. J

    Let's talk PORROS!

    A defective design leads to problems when the device is used, usually after the legal warranty has expired. This is called a hidden fault, planned obsolescence, predetermined breaking point or: If you buy too cheap, you buy several times, you get what you pay for. Short-lived, hardly repairable...
  18. J

    Let's talk PORROS!

    Your post is very interesting for me. Will you explain the quoted text a little more? Problem before, what exactly will be better with which special glasses? If you don't want to do this publicly, feel free to PM. Happy new year and best wishes. Jessie Dennis, post #106: Thank you for your very...
  19. J

    Let's talk PORROS!

    Bedankt, Gijs. CF en een verrekijker zonder laserfilter en traliewerk vind ik prima. De Kern Pizar wordt opgemerkt. Jessie (Thank you Gijs. CF and binoculars without laser filters and reticle are fine with me. Kern Pizar is noted.) Kern Pizar's have no multiple coating?
  20. J

    Let's talk PORROS!

    For which purpose is the foil used? Can an amateur Ebay seller easily recognise the foil if I ask?
  21. J

    Let's talk PORROS!

    Hi porrosaurs, that is also a nice porro: https://binocular.ch/leica-swiss-army-8x30-single-hinge/ Unfortunately, I only know it from pictures. I almost pressed "buy" on Ebay. Best wishes. Jessie
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