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  1. Simon S

    Bushnell Rangemaster: Vintage Binocular vs. Modern Birds

    I few years ago I made a Frankenstein Swift Saratoga fitted with Bak4 prisms from an Audubon model. The difference in that the edges of the field were brighter than on a stock model, other than that little changed. See it here....It's still alive...
  2. Simon S

    Bushnell Rangemaster: Vintage Binocular vs. Modern Birds

    Well I have just bought an FPO with Bak4 prisms, will be interesting to compare the other side by side.
  3. Simon S

    Bushnell Rangemaster: Vintage Binocular vs. Modern Birds

    i think you will find the Rangemaster has coatings on all the lenses in the ocular. Mine does indeed appear to have low index prisms, however that is not necessarily a bad thing. Just as a digital camera with a high count pixel sensor sounds good, there are disadvantages. Bk7 prisms are less...
  4. Simon S

    Bushnell Rangemaster: Vintage Binocular vs. Modern Birds

    Is your Zeiss clean inside? These binoculars gas inside resulting in misty prisms. Worth a check.
  5. Simon S

    Bushnell Rangemaster: Vintage Binocular vs. Modern Birds

    The Rangemaster is a flagship model of the Bushnell, I have the same model but needing attention to an eye lens. They are despite this fault sharp and wide but not as bright as a modern multicoated binocular.
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