• 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. John A Roberts

    Premium (Alpha) vs Image stabilized

    In terms of significantly reducing the bulk of IS binoculars, by chance I just came across this example of a 16x42 marketed by Bresser. See the details at: Bresser | BRESSER 16x42 STABILIZER OIS binoculars with image stabilizer | Expand Your Horizon It seems to be a development of a 16x42...
  2. John A Roberts

    Premium (Alpha) vs Image stabilized

    And the full lineup . . .
  3. John A Roberts

    Premium (Alpha) vs Image stabilized

    And two more images, this time comparing the Canon IS 10x30, 12x32 and 10x42. From: Comparison: Canon 12x32 vs 10x30 IS II - Binoculars - Cloudy Nights and: Canon 10x42L IS vs. Canon 12x32 IS... - Binoculars - Cloudy Nights John
  4. John A Roberts

    Premium (Alpha) vs Image stabilized

    Hi MiddleRiver (post #89), The Canon IS 18x50 is BIG! See a quick comparison to a medium sized conventional x42, the Swarovski NL; and the much larger SLC x56: • Canon 18x50 - 7.6” (193 mm) OL (as is the 15x50 in the image) • Swarovski NL x42 - 6.2” (158 mm) OL (with eyecups retracted) •...
  5. John A Roberts

    Premium (Alpha) vs Image stabilized

    Hi again Dennis, So the Fujinon's far greater objective offset - compared to all the other binoculars discussed - is not the obvious factor? 🤷‍♂️ See a quick combined image of an FMTR-SX 10x50 and a Habicht 8x30 (the objective axes at the top are in line). John The Habicht image is from...
  6. John A Roberts

    Premium (Alpha) vs Image stabilized

    To give an idea of the amounts of objective offset possible for different prisms and binocular types: A) John/ Tringa 45 has previously provided measurements for the following roof prism models, in post #6 at: [Tech] Are most/all roof binocular oculars and objectives collinear? Using an IPD...
  7. John A Roberts

    Premium (Alpha) vs Image stabilized

    Hi Ted (post #19), Yes, that is a good point. However, while it’s true in an absolute sense, it’s not significant in terms of the optical effect - when compared to the degree of offset typical to Porro prism binoculars in their usual configuration e.g. as with a post-WWII version of the CZJ...
  8. John A Roberts

    Premium (Alpha) vs Image stabilized

    Hi Dennis, As can be seen in the top view, the objective and eyepiece axes have no horizontal offset, so there is no conventional Porro prism binocular like effect. That's in contrast to the vertical offset shown in the side view. John
Back
Top