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

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  1. vop

    Just to be shure...

    Alpen Optics Rainier HD ED...? Why HD and ED? Pure stupid or... what? Will it have a cry wolf effect? Where will this end? Why do I even bother?
  2. vop

    Dof

    What, other than aperture and focal length decides the depth of field in binoculars?
  3. vop

    Why less F O V with larger aperture?

    How come that a Xx30 bino of the same line (almost always, what I've seen) have larger F O V than a Xx40, or even more than a Xx50? It can't just be to compensate for less light gathering, can it? ;) (I mean, that's what the lesser weight does!) :-O
  4. vop

    VERANO BGA PC OASIS 8x32

    Is anyone using, or have tried the Verano BGA PC Oasis 8x32? If so, what's good/bad about them? How is, for example the focusing wheel, CA and edge sharpness? Would be happy to know...
  5. vop

    How to best fix a too loose hinge?

    I have a pair of Swift Audubon 828, which are great except for the too easily movable hinge. I've seen a pair that had matches glued to the gap. I don't know if that's a standard solution, but it won't work for me since I want to be able adjust the fit when lending it. I also don't want to do...
  6. vop

    Tse-14we

    I have a Kowa 823M with the older TSE-14WB eyepiece. I just wonder if there is any apparent optical improvements in the TSE-14WE (or the -C & -D that should be in-between) or just the twist-up eyecup?
  7. vop

    Digiscoping, but how...?

    I just bought a nice used Kowa 823M and I have a Nikon D60 DSLR. So I'm thinking: why not start digiscoping? Just get the SLR attachment adapter and get going. And then I thought: maybe it's better to trade in the D60 for a Coolpix 6000 or some such, and do it that way. :h?: And now I'm...
  8. vop

    How is the Canon PowerShot A2100 IS?

    My wife is thinking of buying a compact camera, and thought the Canon PowerShot A2100 IS looked nice. Does anybody know if it's any good? It's for general photographing and maybe digiscoping too. Thanks in advance :gh:
  9. vop

    Wide vs Zoom

    I presume this has been discussed before, but maybe I've found another angle: is the brightness generally better (the exit pupil should be the same, or..?) in a 30X wide then in a zoom eyepiece (set at 30X); or is it just the angle of view that suffers (and eye relief)? Also does the image...
  10. vop

    BK-7 or BaK-4 Prism

    I have read that the Opticron ES 80 GA has BK-7 prisms. Is that also true for the HR 80 GA ED, and other scopes at the "not-so-expensive" side of the scale? Have also seen much cheaper ones that boasts BaK-4 prisms... I also have understood that BaK-4 prisms have a higher refraction index, and...
  11. vop

    CA in the TNS 661?

    How serious is the chromatic aberration in the 661 (or how big is the difference compared to the 663) with, let's say 30, 45 and 60 times magnification in fairly normal conditions? When digiscoping i guess it's a big deal, but for regular field use, since the 663 is almost twice as expensive as...
  12. vop

    Suggestions for Spotting Scope purchase, please

    I'm quite new to birding, and I have the Audubon HHS binoculars (which I'm very pleased with) and a Focus Target 7045 spotting scope (which is ok at closer range, like 150 meters and with a 30xW eyepiece; but quite bad at high magnifications and ranges). I'm planning to buy a spotting scope...
  13. vop

    Hi there fellow birders

    :cat:
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