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Bausch & Lomb Optical Co.

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#1 JJordan

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Posted 10 November 2008 - 12:05 AM

Here is another objective lens I have in my junk box, does anyone have any info ?

B&L Rochester, NY
Aero Tessar
FL = 24" (610mm)
F6.0
VF9072R

Thanks

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#2 clamchip

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Posted 10 November 2008 - 12:43 AM

That brings back memories. I had a few like that only they were Aero Ektar.
Arial photo lenses from WWII. I remember mine being Kodak.
I built rich field telescopes with them and have not been the same since.
I had 6"X24" cemented doublets and I used some gigantic EP's from Edmund Scientific. I will never forget the views.

Robert

#3 Lew Chilton

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Posted 10 November 2008 - 12:53 AM

Amateur astrophotographers in the 1950s, 60s and 70s often used these economical war surplus aerial camera lenses with 4x5 cut film like Kodak 103a-E or 103a-O.

Two Sky & Telescope advertisers who sold these lenses were Edmund Salvage, Barrington, NJ (later Edmund Scientific) and C&H Sales in Pasadena, California.

#4 Vesper818

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Posted 10 November 2008 - 01:38 PM

So, Are you going to build a scope out of it???? :jump: :jump: :jump: :jump:

#5 JJordan

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Posted 10 November 2008 - 01:45 PM

I actually have 2 of these. One only has the "VF9072" marking. To answer your question, yes. When ??? Currently in the middle of restoring a vintage orange tube C14. Up next is the Zeiss Nr.7884 which mostly survived hurricane Katrina.

#6 jimarshall

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Posted 10 November 2008 - 02:03 PM

I have the Kodak Aero-Ektar version of this lens and I was going to build a RFT out of it, but after reading some post on cloudy nights about what a poor telescope it makes, I have not bothered to do so. Boy, talking about a heavy paper weight.

#7 woodsman

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Posted 10 November 2008 - 02:20 PM

I have an older B&L Spotting scope from the 70's, made in Japan, and the optics are better than any 60mm telescope I have ever observed through. They did make good stuff back then.

#8 GeneDiG

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Posted 11 November 2008 - 09:14 AM

They didn't call B&L the "American Zeiss" for nothin'! Cryin' shame they no longer make optics.

#9 Edward E

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Posted 04 January 2009 - 02:05 PM

Hello, I just stumbled across this forum yesterday. What a surprise to find someone else with a B&L Lens. I have a whole telescope that I use. Here are some pics of the scope and lens. I purchased the scope from an Estate sale. The owner stated that her late husband purchased the scope from the Air Force, back in the 60s but that was all she knew about the scope. The telescope has a large field of view ~ 3.5 degrees. I used it last spring to do the Messier Marathon. That was a lot of fun! Here are a few pics of the scope.

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#10 JJordan

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Posted 04 January 2009 - 02:10 PM

Hi Edward E,
I would like very much to see your pictures but it appears the link is local to your computer.
Jack

#11 Edward E

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Posted 04 January 2009 - 02:20 PM

Another Pic.

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#12 Edward E

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Posted 04 January 2009 - 02:21 PM

The whole scope.

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#13 JJordan

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Posted 04 January 2009 - 02:49 PM

It looks like the lens is mounted about midway what appears to be the dew shield. Assuming the studs in the wall are 16" on center that makes the 40" focal length. Am I looking at this correctly ?

Problem with mine - it states a 24" focal length but the sun/paper focuse shows the actual length to be closer to 6 - 8". I havent got it to work yet.
Jack

#14 MASILMW

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Posted 04 January 2009 - 04:09 PM

Jack,

You have the front element of the lens assy. Do you have the rear too?

SF

#15 JJordan

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Posted 04 January 2009 - 04:40 PM

Hi SF,
I do have another assembly that is marked with only the "VF9072R". (The unit on the right) From what I can tell they were cut to remove them from a tube. The same tube, dont have a clue. Internet search has not yet turned up any original info.

I found these in a friends garage cleanout and dont know anything other than what has been told here.

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#16 MASILMW

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Posted 04 January 2009 - 05:10 PM

It looks like you're missing the center part of the lens system that held the iris diaphram. You don't need it to make a scope. You just need the spacing instructions. If you have an infinity light source to use you can get real close without the specs. To try to use that lens visually though, you need a heavy yellow filter. Those lenses were really shifted to the blue.

SF

#17 refractory

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Posted 04 January 2009 - 05:28 PM

Shifted to the blue- yeah, especially if aimed UP! Hahahahahah!

Jess Tauber

#18 jimarshall

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Posted 04 January 2009 - 06:13 PM

Your Bausch & Lomb probably looked like my Kodak when it was completely assembled.

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#19 JJordan

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Posted 04 January 2009 - 06:30 PM

Hi Jim,
That looks great. It also has the same FL and f:6.0 as mine.

There are also other common points, Rochester NY, AERO -, and the same hole filled with yellow something. Were the two companies related ?

At any rate the short FL of what I know is only the front lens makes since.

Thanks
Jack

#20 Edward E

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Posted 04 January 2009 - 08:25 PM

That is correct Jack, it is 5 inch f8 lens, 40 inch fl. The eyepiece is a 38mm Erfle with ~ 68 degree FOV. It has 2.5 degreed true FOV not 3.5 like I stated before hand.

#21 Edward E

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Posted 04 January 2009 - 08:25 PM

That is correct Jack, it is 5 inch f8 lens, 40 inch fl. The eyepiece is a 38mm Erfle with ~ 68 degree FOV. It has 2.5 degree true FOV not 3.5 like I stated before hand.

#22 jimarshall

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Posted 04 January 2009 - 08:26 PM

I suspect these two lens types were used interchangeable on the same aerial camera. The relationship between Kodak and B & L was probably WW 2 when a lot of company's worked together...GM and Ford making aircraft, Packard manufacturing Rolls Royce aircraft engines, Argus producing tank telescopes and the list goes on and on. Anyway, if you want to respace your lens elements, the brown part on mine measures 71.5mm. That should get you in the ballpark.

#23 JJordan

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Posted 04 January 2009 - 08:54 PM

Thanks Edward E.
Thanks Jim.
Maybe I have enough clues to get on the right track now. I have to go back to work tommrow :( I can fabricate a "beam" to set and test the spaceing and hopefully 'shift to the blue' soon.
Thanks
Jack

#24 Edward E

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Posted 05 January 2009 - 11:32 PM

The one time I had my scope apart, its lens assembly looked like the pic of the Kodack lens assembly. Widly spaced lenses. Keep us informed of your progress and if I can be of any help just post a note here or send me a privet gram. Good luck! :hamsterdance: :hamsterdance:

#25 DAVIDG

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Posted 06 January 2009 - 09:32 AM

A word of caution about those lenses that have the amber tint to the glass. That is an indication that the glass maybe radioactive. Thorium and Uranium was used back then to give the glass a higher refractive index.
I personally know of two the lens that set off alarms. We had a clean of the labs a few years ago and an Aero Ektar was tossed in a dumpster. All the material is screened by the scrap metal company and that dumpster set off the alarm for alpha particles. They sent it back here were it was dumped in parking lot and gone through and the lens found.
A friend lives in Canada and purchased one of the lens a number of years ago. He built a wide field scope with it and brought down to Stellafane in Springfield Vermont about 5 years ago. When he tried to cross into the USA he was stopped because they detected radiation. Sure enough it was the lens.
Here is a link on the subject http://home.earthlin.../aeroektar.html


- Dave


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