• Welcome to BirdForum, the internet's largest birding community with thousands of members from all over the world. The forums are dedicated to wild birds, birding, binoculars and equipment and all that goes with it.

    Please register for an account to take part in the discussions in the forum, post your pictures in the gallery and more.
ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

Search results

thxpress_search_the_forum Search Opus
  1. A

    Review: GPO Passion HD 8x42

    Thanks, Henry. I have noted (since before) that you use 52.5 to divide the field in feet at 1000 yards to convert to degrees, but doesn't the small-angle approximation actually give us 52.4? (2.π.1000.3/360 = 52.359...) Hence my 7.2 deg. (rounded from 7.156...) and your 7.14! "Unless there is an...
    • adhoc
    • Post #32
    • Forum: GPO
  2. A

    Review: GPO Passion HD 8x42

    Henry, I did note the 10x50 configuration, and that the apparent FOV is wider. But what Alexis stressed is the real FOV. I re-copy his sentence with the middle part now included: "FOV is about finding birds, and being _actually_ wider is what makes for superior utility." I did wonder about how...
    • adhoc
    • Post #29
    • Forum: GPO
  3. A

    Review: GPO Passion HD 8x42

    Steve, thanks for another very informative review. Alexis, are we not a bit spoilt these days!? Please see this thread on "Chandler S. Robbins amazing bins" (recently re-active on his death). Its FOV is also 7.2 degrees. He found birds! And that binocular (in that state) is the very picture of...
    • adhoc
    • Post #25
    • Forum: GPO
Back
Top