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  1. Renze de Vries

    Eye cups Swarovski Habicht 10x40 GA

    I know the Swarovski porro 10x40 GA has short eye relief (12 a 13 mm) and is definitely not designed to be used with spectacles, but I like to try the possibility anyway. Question: can I take off the eye cups easily? Would I gain some mm's by using the binocular without eye cups? Thanks, Renze
  2. Renze de Vries

    Diopter markings on Genesis XD reversed

    Hi, Have you Kowa users ever noticed that Kowa doesn't conform to the usual markings of + and - on the diopter setting? At least on my Kowa Genesis XD 8.5x44 the + and - are reversed. Renze
  3. Renze de Vries

    Leica's Noctivid and 3D

    I’m somewhat bewildered by the fascination, if not to say obsession, on this forum with Leica Noctivid’s 3D view. Was it the marketing department at Wetzlar that turned up the heat? Possibly, but let’s see what is actually stated on Leica’s website: ‘(…) image plasticity almost like in 3D’...
  4. Renze de Vries

    Yet another Leica Noctivid review

    Having used the Noctivid 8x42 for more than a month now, there are two aspects that strike me: transparency and ease of view. The Noctivid’s image is unusually clean, free from aberrations. I don’t remember an 8x40 binocular where I saw so little impulse to change focus. The kind of...
  5. Renze de Vries

    Flat Field technology: the hows, the why's, the consequences

    Hi all, I'm confused (again) by a modern phenomenon in binoculars called flat field technology. I do know something however: it's a completely different phenomenon than distortion. I also know the two are often mixed up. Question is, are they related, if not in theory, than possibly in...
  6. Renze de Vries

    Early Audubon on sale

    Early Audubon (type 0) on sale Hello Swift historians, I can't refrain from making you aware of an early Swift Audubon on offer on eBay USA. This is the first type Audubon with a 420 ft. RFoV, not yet marked model 804 (and so called by us type 0). Most of these were made in the 1950's, this...
  7. Renze de Vries

    Swaro's new strap (Hello rain guard haters)

    Now we all know rain guards are as annoying as they’re essential, don’t we? We’ll have them mounted on our binocular straps as prescribed by the manual, i.e. at one point, at two points, whatever, but most of the time it doesn’t rain at all and yet the rain guard is still there doing nothing but...
  8. Renze de Vries

    Budget Eden 8x42 HD remarkable quality

    Hi, I tested an Eden 8x42 binocular, available via webshops in Europe for 149 Euro, and found it of remarkable quality. See the review section. Renze
  9. Renze de Vries

    Handshake and image size in porro vs. roof

    I posted this in response to KorHaan's contribution to the Chinese Bins-thread, but think it's better served by a thread of its own. While comparing roof binoculars to porro binoculars handheld and 'tripoded' KorHaan found the porro's performance better than the roofs, when handheld. His...
  10. Renze de Vries

    What makes us, binocular users, collect?

    While contemplating the thread ‘What makes us, binocular geeks, tick’ it occurred to me that the subject could be related to another common trait found among binoculars users, the urge to collect. I say ‘could be’ because I’m not sure. Maybe the fascination with looking/watching is really...
  11. Renze de Vries

    What makes us, binocular geeks, tick?

    It’s the birds, isn’t it? No, it ain’t. In the few years I’ve been enjoying this forum, I learned that for a considerable part of the subscribers the relevance of optics goes way beyond the object. Birds may have aroused our curiosity initially – and on occasion they still do - but something...
  12. Renze de Vries

    Swiss Navy binoculars !

    Dear binocular historians, Please have a good hard look at eBay item 220116003490. No, I don't mean the binoculars, I mean the brand! As every Dutch schoolchild from the age of 11 knows, the Swiss Navy was defeated by our fleet, led by admiral Michiel Adriaenszoon de Ruyter, in Syracuse Bay on...
  13. Renze de Vries

    Air pressure and binoculars

    Hi, In this thread http://www.birdforum.net/showthread.php?t=42635 about fogging Ultravids (focus wheel windows really), Otto McDiesel wonders if this could have something to do with pressurized cabins on airplanes. Which brings up an experience I had with a pair of Zeiss West 10x50 porro's...
  14. Renze de Vries

    Customer service Leica Europe

    Hello (forthcoming) Leica-owners, Let me tell you about my experiences with the (once?) famous Leica after sales-service. After reading some horrorstories here and there, I was anxious to try the Leica service out myself as soon as I got the chance. And I did. My Ultravid 8x42 BL, bought in...
  15. Renze de Vries

    Differences in Swift Audubon mark I, II, III ?

    If I'm well informed, Swift updated their 8.5x44 Audubon porro (804) a few (two, three?) times. Some questions about them: How can the different versions be recognized? Did Swift improve them while updating? And if so, in what way? (mechanically, optically aso). Thanks in advance, Renze de Vries
  16. Renze de Vries

    Happy cyclops, please join in

    Hello scopers, In the binocular section I started this thread about experiencing image size in scopes vs. binoculars: http://www.birdforum.net/showthread.php?p=284383#post284383 Problem at stake: how is it possible that I experience the image through a telescope as small (compared to the view...
  17. Renze de Vries

    Experiencing image size in scopes and binoculars

    Hello birders, I'm rather new to this forum and so I don't know if this item has been discussed before, for instance in the scope-section. Anyway, I feel it belongs here. The problem is: I don't like scopes. I also know why: I'm addicted to binoculars, I don't like to look with one eye, and...
  18. Renze de Vries

    Porro and roof object size

    This is an effort to pick up an interesting thread which was lost when the site went down recently. Someone posted the observation that porro and roof binoculars of the same magnification deliver the rather puzzling effect of presenting the image (object really) different, i.e. in roof...
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