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

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    Jason Venture 4000 7x25

    I took them out today before committing them to 'on hold' status. There is a big thaw going on and the birds were going crazy looking for bugs before it chills again... bluejays, woodpeckers, titmice, warblers, nuthatch, chickadees, crows checking it all out. I got quite a workout at short...
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    Jason Venture 4000 7x25

    Epilogue: The diopter adjustment is too loose and shifts in the case. I need to acquire quality thick grease in order to work this one. The gun/choke stuff is too light. Meanwhile, some Nikon NASCAR 8x25s (a bit like Sportstar or Trailblazer) with repaired...
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    Jason Venture 4000 7x25

    Thnaks for pointing out my obsession with irises, Highway Dog. It lead to an epiphany today. Fieldwork: I took the Venture 7x25 out to the local bird bench by the pond. Even better than tested. I think my test range is too severe. Very comfortable and sharp. It just didn't have the...
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    Jason Venture 4000 7x25

    The main iris (when it exists) is the path-restricting tunnel or aperature (or combined) just behind the objective lens. It usually appears to go straight back but that's an illusion caused by the magnification of the objective. Older ones typically went way back towards the prisms and had a...
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    Jason Venture 4000 7x25

    That's a fascinating history. Their introduction of the rapid focuser and its ingestion into the Bushnell food chain should not be the proudest moments, but they had solid extremely solid binoculars. Their Model 143 is an example of a very ordinary 7x35 with surprising performance from full...
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    Jason Venture 4000 7x25

    I got the reverse porro. I was tempted by the wide-roof, but I'm obsessed with contrast. I missed out on a bid for the Venture 4000 7x35s recently. Snipers took the price violently up with seconds to go. It has a reputation for sure.
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    Jason Venture 4000 7x25

    This model was made to be a Bushnell Custom clone (or a me-too), with premium UVC coatings and BAK4 prisms, field-flattening in the eyepiece, and deep irising. I took delivery on an interesting pair yesterday, and did a nicotine cleaning, a light WD40 grease cut on the objectives, and went...
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