What's new
New posts
New media
New media comments
New profile posts
New review items
Latest activity
Forums
New posts
Search forums
Gallery
New media
New comments
Search media
Reviews
New items
Latest content
Latest reviews
Latest questions
Brands
Search reviews
Opus
Birds & Bird Song
Locations
Resources
Contribute
Recent changes
Blogs
Members
Current visitors
New profile posts
Search profile posts
ZEISS
ZEISS Nature Observation
The Most Important Optical Parameters
Innovative Technologies
Conservation Projects
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
BirdForum is the net's largest birding community dedicated to wild birds and birding, and is
absolutely FREE
!
Register for an account
to take part in lively discussions in the forum, post your pictures in the gallery and more.
Forums
Binoculars & Spotting Scopes
Binoculars
Konrad Siel at Swaro on "Progress in Binocular Design" in 1991
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Kevin Purcell" data-source="post: 1278181" data-attributes="member: 68323"><p>I posted this paper deep on the CamerlandNY Mystery bin thread but I've posted this up here too so more people see it.</p><p></p><p>The paper is "Progress in Binocular Design" from Konrad Siel at Swaro in 1991. Very interesting and not too technical read on the state of binocular design in 1991 (just at the transition to phase correction in roof prism bins).</p><p></p><p>What he says is still relevant today!</p><p></p><p><a href="http://www.optics.arizona.edu/optomech/references/papers/Seil%201991.pdf" target="_blank">http://www.optics.arizona.edu/optomech/references/papers/Seil 1991.pdf</a></p><p></p><p>One of my favorite quotes:</p><p></p><p></p><p></p><p><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /></p><p></p><p>He talks about how to mount prisms, how prisms (like thick plates) increase aberrations off axis, the effect of the quality of prism glass, how multilayer AR coatings <em>reduce</em> contrast in Schmidt-Pechan prisms systems(!) and how phase coatings work (and what impact they have when they aren't used).</p><p></p><p>It's interesting to get an insight into the number of compromises that you need to make to get a binocular. I'm not surprised we can't agree on the "best" bin.</p><p></p><p>Conclusion:</p><p></p><p></p><p></p><p>That was written 17 years ago in Austria. But it's pretty much a guide to what the Chinese optical industry has been doing recently to make better binoculars: </p><p></p><ul> <li data-xf-list-type="ul">Better optical design. </li> <li data-xf-list-type="ul">Better optical glass. </li> <li data-xf-list-type="ul">Better optical manufacturing (to repeatable high tolerances). </li> <li data-xf-list-type="ul">Better AR coatings. </li> <li data-xf-list-type="ul">Better phase coatings.</li> <li data-xf-list-type="ul">Better mounting systems and automated assembly (glue, check and set). </li> </ul></blockquote><p></p>
[QUOTE="Kevin Purcell, post: 1278181, member: 68323"] I posted this paper deep on the CamerlandNY Mystery bin thread but I've posted this up here too so more people see it. The paper is "Progress in Binocular Design" from Konrad Siel at Swaro in 1991. Very interesting and not too technical read on the state of binocular design in 1991 (just at the transition to phase correction in roof prism bins). What he says is still relevant today! [url]http://www.optics.arizona.edu/optomech/references/papers/Seil%201991.pdf[/url] One of my favorite quotes: ;) He talks about how to mount prisms, how prisms (like thick plates) increase aberrations off axis, the effect of the quality of prism glass, how multilayer AR coatings [I]reduce[/I] contrast in Schmidt-Pechan prisms systems(!) and how phase coatings work (and what impact they have when they aren't used). It's interesting to get an insight into the number of compromises that you need to make to get a binocular. I'm not surprised we can't agree on the "best" bin. Conclusion: That was written 17 years ago in Austria. But it's pretty much a guide to what the Chinese optical industry has been doing recently to make better binoculars: [LIST] [*]Better optical design. [*]Better optical glass. [*]Better optical manufacturing (to repeatable high tolerances). [*]Better AR coatings. [*]Better phase coatings. [*]Better mounting systems and automated assembly (glue, check and set). [/LIST] [/QUOTE]
Insert quotes...
Verification
Post reply
Forums
Binoculars & Spotting Scopes
Binoculars
Konrad Siel at Swaro on "Progress in Binocular Design" in 1991
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more...
Top
