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  1. Renze de Vries

    Zeiss 20 x 60 S binoculars; real or fake?

    Serial number 2659587 = 2004/2005
  2. Renze de Vries

    Historical Review of Swift 804 Audubon Binoculars

    Hi, This binocular is well worth checking for imperfections and repair. Contact Nicolas Crista at NRC Optics, he really knows his stuff. Renze
  3. Renze de Vries

    Historical Review of Swift 804 Audubon Binoculars

    yes, 1970. And as such it is the first edition of type 3, a model made for the European market. Later European editions came with blue or gold ribbons. In our survey it's named type 3c, but for chronological reasons it should have been type 3a. Type 3's were made until Hiyoshi completely...
  4. Renze de Vries

    Interesting Optics Trade discussion on where Leica binoculars are made.

    Hi Henry, Good stuff, thank you. I tend to agree with your findings, certainly when it comes to the aspect of sharpness. However, as I've always understood, sharpness is only one aspect of resolution. And to me, resolution is what really counts. If we're comparing porro's and roof binoculars on...
  5. Renze de Vries

    NL Pure 8x42 eyepiece lens edge issue. Is this common?

    Gijs, This is exactly what happened to me recently. A guy, who had taken an interest in one of my binoculars, at least this was what he told me, came by to check the instrument. He took his cell phone, switched the flash light facility on and inspected the internals of my pristine binocular (it...
  6. Renze de Vries

    Historical Review of Swift 804 Audubon Binoculars

    Hi, Yeah, keep in touch, lovely. Renze
  7. Renze de Vries

    Should I sell the Noctivid 8x42, replace with the new Swarovski 8x42 NL Pure?

    Should you sell the Noctivid? Immediately! First of all, the Noctivid is too small. Only women and children will be able to get their fingers between the barrels. The Noctivid is too heavy. It’s extremely important for binoculars to give the impression of lightness, so you can’t resist...
  8. Renze de Vries

    6 January 2022 - New Leica announcement

    I don't understand, what exactly are white skies? And why would the Noctivid be painful? Renze
  9. Renze de Vries

    6 January 2022 - New Leica announcement

    Thanks, very good!
  10. Renze de Vries

    6 January 2022 - New Leica announcement

    The only interesting aspect for me, as a birder, is the application of the Perger prism. I'm convinced Leica is able to do nice things with it in future binocular designs. So what does the Perger do here, in this instrument for hunters? How about the view? I see figures for light transmission...
  11. Renze de Vries

    6 January 2022 - New Leica announcement

    Tom, Yes I know. And leica is no exception to the rule. It's well known for instance that the last Leitz Trinovids with the red badges were better than earlier production Trinovids. But there's sample variation at work as well. I have seen samples of 1960 Trinovids which were so good, I wouldn't...
  12. Renze de Vries

    6 January 2022 - New Leica announcement

    Tobias, what do you mean by 'stupid stuff'? The Noctivid? Because it doesn't meet your demands, like '3D pop' and complete absence of flare? Or because of seriously considering a porro prism like the Perger? Renze
  13. Renze de Vries

    6 January 2022 - New Leica announcement

    So according to your observation, Leica improved their Ultravid line considerably, without advertising the fact? Just by suddenly making improved batches with no further notice. This doesn't sound good to me at all. I think it's alarming. Think about it. What would this practice mean for the...
  14. Renze de Vries

    6 January 2022 - New Leica announcement

    Thanks Henry, excellent thread. Renze
  15. Renze de Vries

    6 January 2022 - New Leica announcement

    The Youtube is intriguing for several reasons. I suppose these are Leica reps discussing the Perger prism, right? Well, the left guy says he would be very interested in a non-rangefinder model, i.e. a conventional binocular having the Perger prisms on board. Could this be an indication that...
  16. Renze de Vries

    Well, for no good reason other than curiosity, I ordered a pair of 7x35 Retrovids and 7x42 Ultravids

    Oh yes, eye cup adaptation is not only a matter of width but also of height. I have experimented rather unseccesfully because, as has been remarked here already, the design of the Leitz Trinovids is so fine that altering a detail easily distorts it. In my experience, and taste, adding anything...
  17. Renze de Vries

    Well, for no good reason other than curiosity, I ordered a pair of 7x35 Retrovids and 7x42 Ultravids

    I'm pretty sure we will find a solution. I'm experimenting (again). What is your ideal diameter? Renze
  18. Renze de Vries

    Noctivid 10x42 Olive Green Edition

    My dear friends, how about this? What do you think? Renze
  19. Renze de Vries

    New Retrovid 7x35

    Gijs, Thank you! This is the response I hoped for. So while you compared Leitz Trinovids with the Leica retro (very worthwhile, someone just had to dot it!) something else was in your agenda too. I can relate to that, as this is how the mind works, isn't it. With respect to your concern with the...
  20. Renze de Vries

    Well, for no good reason other than curiosity, I ordered a pair of 7x35 Retrovids and 7x42 Ultravids

    Jim, There was a time when expert sellers like Terry Small and Eric Wood (UK) listed Leitz Trinovids on eBay. They really knew their stuff, had good contacts in the repair business and so were able to offer superbly renovated Trinovids. At that time aftermarket eye cups were still available...
  21. Renze de Vries

    New Retrovid 7x35

    Hello Gijs, Are you still with me? As you probably know, I don't have measured data, and in case I would have them I would refrain from making them available. Why? Because there’s no need. Because they’re already in existence. Because it would be highly unlikely my data would be any different...
  22. Renze de Vries

    New Retrovid 7x35

    Now come on Gijs, I'm sure you can do better. Renze
  23. Renze de Vries

    New Retrovid 7x35

    Here we have an example of Gijs' tests which makes me wonder about his procedures, accuracy and - ultimately - usefulness for us. First off, this a remarkably mixed bag of binoculars selected for testing. Is there any sound reason for comparison here? Also, I'm quite surprised bij Gijs'...
  24. Renze de Vries

    New Retrovid 7x35

    This matches my experiences in every aspect. Renze
  25. Renze de Vries

    Well, for no good reason other than curiosity, I ordered a pair of 7x35 Retrovids and 7x42 Ultravids

    The best solution I found most to my liking - without destroying the beautiful design - was to apply the 18mm replacement eye cups, issued by Leitz/Leica in the later stages of Trinovid production. These are softer rubber than the earlier originals and so last considerable longer but important...
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