james holdsworth
Consulting Biologist
Brock, I am not a member there. Could you ask Borhan to post his info. here in the classifieds please? I am very interested in that binocular.
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Early Elite's (1 Viewer)
- Thread starter james holdsworth
- Start date
Brock, I am not a member there. Could you ask Borhan to post his info. here in the classifieds please? I am very interested in that binocular.
elkcub
Silicon Valley, California
Ronh,
Many thanks for the web site. I believe it will play an important part in figuring out a formal solution. Naturally, it's all based on standard lens equations. :t:
Ed
brocknroller
porromaniac
James,
For a hairdresser, he sells a lot of high end bins. Must get big tips from the ladies.
Are you allowed to post ads if you're not a BF member? He might have the same problem reaching you here.
If you send me a PM with your email, I will forward it to him, and you guys can deal directly.
Brock
james holdsworth
Consulting Biologist
Renze,
Any inkling of what a good condition 7 x 35 B & L is worth? I ask as I have never seen one listed.
Any inkling of what a good condition 7 x 35 B & L is worth? I ask as I have never seen one listed.
James Bean
Well-known member
A Bausch & Lomb 7x35 Discoverer in mint condition + mint case cost me $165 last month.
james holdsworth
Consulting Biologist
I was referring to the Elite's, so should have specified 7 x 36, not 35. Nice find on the Discoverer, though, really nice bins those.
james holdsworth
Consulting Biologist
BTW - Henry, you don't happen to have that BVD review on file somewhere do you?
I haven't been able to find such a review on the website or anywhere on -line.
I haven't been able to find such a review on the website or anywhere on -line.
Renze de Vries
Well-known member
I was wrong. I dismantled a Browning 7x35 and found this Uppendahl prism cluster (see pics).
Renze
Attachments
henry link
Well-known member
Very interesting, Renze. How is the focusing done?
Renze de Vries
Well-known member
Like the Trinovid I guess. See pic
Attachments
henry link
Well-known member
Renze,
I'm not sure how to interpret the photo. Do the field elements of the eyepiece move for focusing?
Henry
I'm not sure how to interpret the photo. Do the field elements of the eyepiece move for focusing?
Henry
Renze de Vries
Well-known member
Henry,
Oh the photograph shows only the focusing mechanism, as seen from the objectives end of course.
I took a deep breath and rescued the poor Browning from the sewer. Well, here goes (see pics).
The focusing mechanism consists of a a small axle, on which the plate-like thing moves up and down. The right side of the plate has a pin into the central focusing axle, the left side has a kind of 'hand' (the end of the plate set perpendicular) which fits into a small groove in the shiny ocular tube. Inside this shiny tube is the ocular cluster with four lens elements (2 doublets). The fifth ocular lens is the field lens which doesn't move as it is fixed (threaded) onto the barrel.
Renze
Oh the photograph shows only the focusing mechanism, as seen from the objectives end of course.
I took a deep breath and rescued the poor Browning from the sewer. Well, here goes (see pics).
The focusing mechanism consists of a a small axle, on which the plate-like thing moves up and down. The right side of the plate has a pin into the central focusing axle, the left side has a kind of 'hand' (the end of the plate set perpendicular) which fits into a small groove in the shiny ocular tube. Inside this shiny tube is the ocular cluster with four lens elements (2 doublets). The fifth ocular lens is the field lens which doesn't move as it is fixed (threaded) onto the barrel.
Renze
Attachments
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henry link
Well-known member
Renze,
Did you mean the eye lens (lens closest to the eye) rather than the field lens doesn't move? This focusing system certainly appears to be identical to the Leitz Trinovid, at least as far as which eyepiece groups move, but I'm not sure any Trinovids used that 2-2-1 eyepiece design.
Henry
Edit: In reading back over this thread I see that you had already determined that the Elite focused like the Trinovid. So much for my memory. Adding the Uppendahl prisms makes for a pretty faithful copy, but with the improvements of multi-coating and, after 1992, phase correction.
Did you mean the eye lens (lens closest to the eye) rather than the field lens doesn't move? This focusing system certainly appears to be identical to the Leitz Trinovid, at least as far as which eyepiece groups move, but I'm not sure any Trinovids used that 2-2-1 eyepiece design.
Henry
Edit: In reading back over this thread I see that you had already determined that the Elite focused like the Trinovid. So much for my memory. Adding the Uppendahl prisms makes for a pretty faithful copy, but with the improvements of multi-coating and, after 1992, phase correction.
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Renze de Vries
Well-known member
Henry/ceasar,
Excuse me, I completely mixed up field and eye (lens). Of course what I meant was that the eye lens is fixed and carried by the housing.
To answer your question (Henry) if the eyepiece design might be identical to the Trinovid: no, it's not. The Trinovid used an Erfle-type ocular, quite different from what we have here for the Browning and Bausch & Lomb. For details of the Trinovid design, see the patent (you've got it).
Anticipating your next question (...) I've took photographs of the ocular lenses. Please keep us informed of your findings.
With respect to multi- and phase coating on this binocular (and the early, first series Elites - or Elite predecessors - in general) this depends of course on the time they were made. And did we date these binoculars yet? Securely?
Renze
Excuse me, I completely mixed up field and eye (lens). Of course what I meant was that the eye lens is fixed and carried by the housing.
To answer your question (Henry) if the eyepiece design might be identical to the Trinovid: no, it's not. The Trinovid used an Erfle-type ocular, quite different from what we have here for the Browning and Bausch & Lomb. For details of the Trinovid design, see the patent (you've got it).
Anticipating your next question (...) I've took photographs of the ocular lenses. Please keep us informed of your findings.
With respect to multi- and phase coating on this binocular (and the early, first series Elites - or Elite predecessors - in general) this depends of course on the time they were made. And did we date these binoculars yet? Securely?
Renze
Attachments
james holdsworth
Consulting Biologist
Are we saying that this generation of Elite's had Uppendahls'?
Renze de Vries
Well-known member
Chad,
These are 2nd generation, with rubber armor (1st gen. pebbled leather indeed) and the focusing wheel still up front. There's one thing however which is somewhat different from the 2nd generation Elites I've seen: the focusing wheel here is finely knurled while on my pics (7x36 and 8x42 Elite) the knurling is wider spaced and could be of some rubber material (finish). So it's possible the 2nd generation might have had a cosmetic update at some point.
(Sorry, can't say anything on coating).
With respect to 1st and 2nd generation Elites, my information on model/issue so far is this:
1st gen.: 7x35 Classic, 8x42 Elite
2nd gen.: 7x36, 8x42, 10x42 all marked Elite
renze
These are 2nd generation, with rubber armor (1st gen. pebbled leather indeed) and the focusing wheel still up front. There's one thing however which is somewhat different from the 2nd generation Elites I've seen: the focusing wheel here is finely knurled while on my pics (7x36 and 8x42 Elite) the knurling is wider spaced and could be of some rubber material (finish). So it's possible the 2nd generation might have had a cosmetic update at some point.
(Sorry, can't say anything on coating).
With respect to 1st and 2nd generation Elites, my information on model/issue so far is this:
1st gen.: 7x35 Classic, 8x42 Elite
2nd gen.: 7x36, 8x42, 10x42 all marked Elite
renze
Renze de Vries
Well-known member
James,
I think we can, with reasonable certainty. As the Browning, being a 99% copy of the B&L 7x35 Classic, has an Uppendahl prism cluster, the 7x35 Classic will have one too. With respect to its twin brother, the 8x42 1st gen. Elite, I would be greatly surprised if B&L would have chosen for a different - S&P - prism cluster for it.
Renze
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