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.

Reply to thread

Message: <blockquote data-quote="iporali" data-source="post: 431445" data-attributes="member: 2925">Hi all,Focusing speed is one of the most significant ergonomical features of the binoculars. A user may love the optics, but may not be able to adapt to overly fast or slow focusing (and vice versa - of course). I seem to remember someone presenting an idea of dual focuser binoculars with two focusing wheels like in the Leica and Zeiss spotting scopes. A free idea for binocular developers: a single wheel with dual speeds. (Not sure I can explain this properly...)Generally a fast gearing for rapid focusing, but with a narrow sector (20-40°) of "play" containing maybe 1:4 slower gearing. In practice the current focus position would carry along the fine (slow) focus region. You would first overfocus slightly and then return to this "fine focus" sector. You would not have to hunt back and forward, but when necessary it would be easy to get back to high-gearing region. The slow gearing would be always where you need it, but at the same time the total rotation range could be small.I understand that it would slightly add complexity of the focus transmission, but I doubt it would become as complex as the mechanism successfully used used in the Swaro EL's.Did I confuse everybody? Comments? <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink    ;)" loading="lazy" data-shortname=";)" />Ilkka</blockquote>

Verification