Archived posting to the Leica Users Group, 2007/01/19
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]About 7 yers ago, Leica Rep had a Leica Day at Camera World in Portland (OR). I took the big (for me) plunge and bought a the 8x32 BA Triovids...at the time a highly recommended birding glass. They still make them as the 8x32 BN; possibly better coating, little different in a few other ways. Both the BA and BN are nitrogen-fill, nice coatings, very high Twilight Factor and can be washed in a little detergent and warm water, rinsed under slow running water. Doubt I'll ever sell them. I wear glasses and enjoy the pull-out for wearing glasses. For wider field of view, I adjust the dioper and look through them "naked". Back then on sale around US $ 830.00. New ones list at around US $ 1,200.00, less on some web sites. Nice combination of weight, ergonomics and superb optics in a smaller package. bobinseattle On Jan 19, 2007, at 16:02, G Hopkinson wrote: Marc, I hadn't thought of that regarding our pupil sizes as we get older. It sounds plausible. However will not the larger diameter exit pupil allow for more latitude in positioning your eyes against the eyepieces? Surely also, the brightness will vary? Subjectively, binoculars with larger objectives are much brighter and more comfortable to use to my older eyes. Cheers Hoppy -----Original Message----- From: lug-bounces+hoppyman=bigpond.net.au@leica-users.org [mailto:lug-bounces+hoppyman=bigpond.net.au@leica-users.org] On Behalf Of Marc James Small Sent: Saturday, 20 January 2007 09:26 To: Leica Users Group; Leica Users Group Subject: Re: [Leica] binoculars - looking for assistance At 06:14 PM 1/19/2007, Don Dory wrote: > Marc, > I appreciate the clarification, but in general have more capability > than you > can use is better than less. When birding the over age dinosaurs seem > to > hide in dark thickets and deep inside fir tress and Magnolia's so I > thought > a little over kill was a good thing. :) Save that it does you no good at all. If your eyes in dark conditions only open to 4mm, then an exit pupil larger than that is completely wasted and of new use: the laws of physics forbid the cramming of a 7mm cone of light into a 4mm hole. And to get that 7mm exit pupil, the camera has to be a lot heavier and larger than one with the smaller exit pupil. This is discussed regularly, as I noted, at both Better View Desired and on a number of astronomical lists. Marc msmall@aya.yale.edu Cha robh b?s fir gun ghr?s fir! _______________________________________________ Leica Users Group. See http://leica-users.org/mailman/listinfo/lug for more information _______________________________________________ Leica Users Group. See http://leica-users.org/mailman/listinfo/lug for more information