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Gerd
sage
Reged: 09/02/05
Posts: 272
Loc: near Stuttgart Schwabenländle
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Can I get some information about the biography of A. Jaegers?
What was his first name, when was the Optical Forma was founded, when and why the production was set?
I own a 6Inch F5 and my local club a 6 Inch F8.
These are fine lenses 
Someone who knew him personally? If there is a photo of him?
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Gerd
Member of the Backnanger Sterngucker
(stargazers of the area round Backnang, Germany)
www.bksterngucker.de
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clintwhitman
Caveman
Reged: 01/01/07
Posts: 2404
Loc: ValVerde CA(SoEasyaCavemanCanD...
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Albert I think was his first name... I have a close to perfect 6" F15 and Joe the guy from Ebay just sold me a 4.25 900mm for my new guide scope project.. I scored it for $75 and he said it is perfect!!
Robert B. Ariail information on europa
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Clint&Debbie Whitman (aveman
1960s 6"F15 Jaegers-Unipons by John Pons on a Byers 812, 1947 4" F15 TINSLEY, 1965 10" F8 CAVE, 1950 5CM & 6.5CM Nippon Kogakus (the twins), 1960s UNITRONS a 152 restored a 160 numbered green lens original mint a 114 original 50s mint, 1950s UNITRON M100 100mm F15 OTA, WO 80mm Florite, ASTROPHYSICS 155 EDFS on LOSMANDY G11, a bunch of Tascos,Sears Mayflowers The list goes on Add infinitum.
Edited by clintwhitman (07/03/09 05:21 PM)
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actionhac
professor emeritus
Reged: 08/09/08
Posts: 713
Loc: WA
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Interesting link Clint.
Under the Jaegers heading it is noted the 1970's Unitron objectives were very poor quality, never seen these words all in the same sentence before.
Robert
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clintwhitman
Caveman
Reged: 01/01/07
Posts: 2404
Loc: ValVerde CA(SoEasyaCavemanCanD...
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I have been saying for years that the 1960s/70s Unitron objectives were iffy at best It took me over fours years to find two 102 1200s that I would say are very very good to use in my 160 unitrons.I have one that is amazing and I am still not convinced it is not a Jaegers 102 F15 coated objective. John Pons even said it was close to perfect. John said there was no way it was a Uniturd!! LOL Thats what John calls them...I Even have a 1970 GREEN Lens Unitron and I hate to say it but I would give that lens a 7 out of 10. On the other hand the Unitron mounts are incredible fun to use and a joy to own. Having a greeat lens is an added bonus!! 
I think 4" lenses and bigger do not come out of the old polishing factory as perfect objectives my experience with most of the 4" Unitron lenses is they are over corrected. Some by a little and some by alot. just a little and the star test is shot. Also guys that buy these are not alway going to go around bad mouthing the expesive lens they just bought!! I dont really care all the bad lenes I have purchased I have resold and I have been totaly honest about what I thought of the lens. But I guess a 5 or a 6 out of ten is better than a cracked or scratched lens??
John Pons is a very Carfull about saying anything good about anything that is not his. He said to me once Jaegers never made a bad lens, that is a quote. For John to say that is saying alot about Jaegers.
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Clint&Debbie Whitman (aveman
1960s 6"F15 Jaegers-Unipons by John Pons on a Byers 812, 1947 4" F15 TINSLEY, 1965 10" F8 CAVE, 1950 5CM & 6.5CM Nippon Kogakus (the twins), 1960s UNITRONS a 152 restored a 160 numbered green lens original mint a 114 original 50s mint, 1950s UNITRON M100 100mm F15 OTA, WO 80mm Florite, ASTROPHYSICS 155 EDFS on LOSMANDY G11, a bunch of Tascos,Sears Mayflowers The list goes on Add infinitum.
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woodsman
Pooh-Bah
Reged: 03/12/08
Posts: 1051
Loc: Colorado Springs, CO
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OK, I have all these refractors, and I have no idea how to test them or even collimate a refractor lens. Other than taking them to a lab, is there a simple way to test one?? I'd like to test my Sears 90mm. I guess I should have paid more attention to the postings from before, because I remember seeing something about a flourescent light test, but I don't know if that is for a refractor lens  , and one where you can check diffraction rings, but I'm pretty unsure what I need to do. Any suggestions guys? Thanks for any help, and happy 4th,  Rich
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artisticwoods
C-14 Orange Tube, C-8, C-5, C-90 Astro Model, C8 Schmidt Camera 8" f1.5, C5.5 Schmidt Camera f1.65, SPI 42mm f/19 Refractor, Sears 90mm f/15.56 Ref, Sears 80mm f/15 Ref, Swift 77mm f/13 Model 831, Scope 60mm f/11.7, Sears 50mm f/12
Unitron Model 140 75mm/1200mm, Unitron model 128 60mm/900mm
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clintwhitman
Caveman
Reged: 01/01/07
Posts: 2404
Loc: ValVerde CA(SoEasyaCavemanCanD...
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Star Testing In the word of the best refractor men alive  Rolands star testing on Roberts SITE
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Clint&Debbie Whitman (aveman
1960s 6"F15 Jaegers-Unipons by John Pons on a Byers 812, 1947 4" F15 TINSLEY, 1965 10" F8 CAVE, 1950 5CM & 6.5CM Nippon Kogakus (the twins), 1960s UNITRONS a 152 restored a 160 numbered green lens original mint a 114 original 50s mint, 1950s UNITRON M100 100mm F15 OTA, WO 80mm Florite, ASTROPHYSICS 155 EDFS on LOSMANDY G11, a bunch of Tascos,Sears Mayflowers The list goes on Add infinitum.
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clintwhitman
Caveman
Reged: 01/01/07
Posts: 2404
Loc: ValVerde CA(SoEasyaCavemanCanD...
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Rich, Spaced doublet objectives should produce the Newton rings you speak of. It very easy, take the dew shield off the ota. Take it under a bright floresent light (shop light). Look at the refelction of light off the lens. While moving it around look past but into the lens you will more than likely start to see a series of lines floating around in the mix of reflections. Theses are interferance rings AKA Newtons rings. If there in a bulls eye pattern the lens in in good shape, well made and space well... If not then Of the 10 or so 4" Unitron lenses I have worked on very few were made well enough to be able to produce newton rings. The ones that did were the keepers. The Nippon Kogakus all have perfect sets of newton rings as with many of the small scopes 80mm or less from Japan. What I can say about them is if they are present upon inspection under the floresent light, after colimation the star tests of the lenses with the rings have all been very good. This was true of the Tinsley. The first thing I checked after unscrewing the cover was the newton rings. 
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Clint&Debbie Whitman (aveman
1960s 6"F15 Jaegers-Unipons by John Pons on a Byers 812, 1947 4" F15 TINSLEY, 1965 10" F8 CAVE, 1950 5CM & 6.5CM Nippon Kogakus (the twins), 1960s UNITRONS a 152 restored a 160 numbered green lens original mint a 114 original 50s mint, 1950s UNITRON M100 100mm F15 OTA, WO 80mm Florite, ASTROPHYSICS 155 EDFS on LOSMANDY G11, a bunch of Tascos,Sears Mayflowers The list goes on Add infinitum.
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woodsman
Pooh-Bah
Reged: 03/12/08
Posts: 1051
Loc: Colorado Springs, CO
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Thanks Clint, I'll try to check for the Newton Rings. That rings a bell and I do remember you mentioning that with the Tinsley. Thanks for the link as well. I appreciate the help and I'll let you know what I find. Rich
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artisticwoods
C-14 Orange Tube, C-8, C-5, C-90 Astro Model, C8 Schmidt Camera 8" f1.5, C5.5 Schmidt Camera f1.65, SPI 42mm f/19 Refractor, Sears 90mm f/15.56 Ref, Sears 80mm f/15 Ref, Swift 77mm f/13 Model 831, Scope 60mm f/11.7, Sears 50mm f/12
Unitron Model 140 75mm/1200mm, Unitron model 128 60mm/900mm
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clintwhitman
Caveman
Reged: 01/01/07
Posts: 2404
Loc: ValVerde CA(SoEasyaCavemanCanD...
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Roland speaks of spherical aberration that means the lens is ground badly, turned edge, over or under corected.what ever the case may be. You Can not tell if the lens is bad unless the focuser is square and the Cell is colimated prior to testing it on a star. Other things like the eyepiece and seeing conditions must also be taken into acount. All this stuff while it seems overwhelming is fairly simple to learn. My suggestion is to find a local old hand at it and pick his brain. There are a million simple tricks that take the lab work out of it.. But trial by error can be heart breaking!! and expensive Thank god for the web and guys like Pons, Lew, Robert, Grisom, and all the other old hands around here...
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Clint&Debbie Whitman (aveman
1960s 6"F15 Jaegers-Unipons by John Pons on a Byers 812, 1947 4" F15 TINSLEY, 1965 10" F8 CAVE, 1950 5CM & 6.5CM Nippon Kogakus (the twins), 1960s UNITRONS a 152 restored a 160 numbered green lens original mint a 114 original 50s mint, 1950s UNITRON M100 100mm F15 OTA, WO 80mm Florite, ASTROPHYSICS 155 EDFS on LOSMANDY G11, a bunch of Tascos,Sears Mayflowers The list goes on Add infinitum.
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clintwhitman
Caveman
Reged: 01/01/07
Posts: 2404
Loc: ValVerde CA(SoEasyaCavemanCanD...
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Rich that guy Woodenstock or whatever the Focuser dude is in your town He is one of the best ATMers in the contry.. Guess who eles comes to mind Jack Eastman Lives up there he is a awsome guy to know and even has a 6" Clark he would love to show you!!!!
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Clint&Debbie Whitman (aveman
1960s 6"F15 Jaegers-Unipons by John Pons on a Byers 812, 1947 4" F15 TINSLEY, 1965 10" F8 CAVE, 1950 5CM & 6.5CM Nippon Kogakus (the twins), 1960s UNITRONS a 152 restored a 160 numbered green lens original mint a 114 original 50s mint, 1950s UNITRON M100 100mm F15 OTA, WO 80mm Florite, ASTROPHYSICS 155 EDFS on LOSMANDY G11, a bunch of Tascos,Sears Mayflowers The list goes on Add infinitum.
Edited by clintwhitman (07/04/09 01:41 AM)
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woodsman
Pooh-Bah
Reged: 03/12/08
Posts: 1051
Loc: Colorado Springs, CO
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I think Jack Eastman lives in Denver if I'm not mistaken. Both would be great for assistance. Thanks, I think I'll start making some phone calls this week. I Appreciate the help, those are good ideas. It clouded up on me after teasing me for a great clear night. Guess I'll try again tomorrow. Rich
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artisticwoods
C-14 Orange Tube, C-8, C-5, C-90 Astro Model, C8 Schmidt Camera 8" f1.5, C5.5 Schmidt Camera f1.65, SPI 42mm f/19 Refractor, Sears 90mm f/15.56 Ref, Sears 80mm f/15 Ref, Swift 77mm f/13 Model 831, Scope 60mm f/11.7, Sears 50mm f/12
Unitron Model 140 75mm/1200mm, Unitron model 128 60mm/900mm
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Gerd
sage
Reged: 09/02/05
Posts: 272
Loc: near Stuttgart Schwabenländle
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Clint,
Thank you so much for your answer.
Mr. Jaegers is still alive?
Someone knows him personally?
Is there a photo?
In the seventies, the German telescope manufacturer Manfred Wachter uses lenses from A.Jaegers.
A famous telescope in Germany was the Wachter 6InchF10 Refractor with a lens from Jaegers.
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Gerd
Member of the Backnanger Sterngucker
(stargazers of the area round Backnang, Germany)
www.bksterngucker.de
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Larry10
member
Reged: 06/16/03
Posts: 46
Loc: NE Ohio
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The original business location was destroyed by a fire many years ago but the business kept going mostly by word of mouth among it's customers, even though advertising ceased for a long time.
There is an Albert Jaegers Jr and an Albert Jaegers III and the company has a website - with an Adobe .pdf catlogue.
This is the e-mail address from their site:
Ajoptics@verizon.net
You might try writing.
There were some interesting anecotes posted on the Astomart website (if my memory is good) by someone who worked in the original factory. I tried a quick search of their forums but could not locate the postings. They were very amusing.
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Larry
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Lew Chilton
scholastic sledgehammer
Reged: 10/20/05
Posts: 984
Loc: SoCal
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Gerd,
Here's a little information about Jaegers that I found on Ancestry.com.
Clint is correct, his name was Albert Jaegers.
Albert J. Jaegers was born in New York on 12 September 1914 and died on 11 January 2005. His last residence was in Lynbrook, Nassau County, New York.
His father, Joseph P. Jaegers (1885-1948?), a house painter, was born in Ohio, and his grandfather, Albert Jaegers (1868-1925), a sculptor, was born in Germany in the area of Wuppertal.
Albert J. Jaegers is survived by a son, Albert J. Jaegers, Jr., who lives in New York.
I hope this information is of help to you.
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I don't get no respect, but my scopes do! 
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1961 Swift 60mm model 839 (2); 2003 TV-102/GM-8; 1959 8" f/6 Treckerscope; 1959 8" f/7.4 Murray Scope; 1959 Fecker Celestar-4; 1978 4" Edmund Astroscan; c. 1986 4-inch Celestron-Vixen SP-C102; c. 1950 20X60 Saturn spotting scope; 1963 7X50 Nippon Kogaku binoculars; Unitron #114 alt-az mount (Swifty-tron)
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Larry10
member
Reged: 06/16/03
Posts: 46
Loc: NE Ohio
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Aha!
I found that Astromart thread:
Jaegers Amart thread
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Larry
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Lew Chilton
scholastic sledgehammer
Reged: 10/20/05
Posts: 984
Loc: SoCal
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What a thread, Larry! I enjoyed it a lot.
I once owned a 6-inch f/15 Jaegers objective that I mounted in an aluminum tube and observed with near Mt. Pinos a few times in the mid-1970s before selling it to a friend for $300. Boy, do I regret selling it now!
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I don't get no respect, but my scopes do!
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1961 Swift 60mm model 839 (2); 2003 TV-102/GM-8; 1959 8" f/6 Treckerscope; 1959 8" f/7.4 Murray Scope; 1959 Fecker Celestar-4; 1978 4" Edmund Astroscan; c. 1986 4-inch Celestron-Vixen SP-C102; c. 1950 20X60 Saturn spotting scope; 1963 7X50 Nippon Kogaku binoculars; Unitron #114 alt-az mount (Swifty-tron)
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Gerd
sage
Reged: 09/02/05
Posts: 272
Loc: near Stuttgart Schwabenländle
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Lew & Larry,
Thank you so much!
Unfortunately, I can not read the thread.
I can not log in astromart anymore.
Astromart does not accept my usual password.
When I reset, I received no mail from astro mart, I do not know why?
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Gerd
Member of the Backnanger Sterngucker
(stargazers of the area round Backnang, Germany)
www.bksterngucker.de
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Larry10
member
Reged: 06/16/03
Posts: 46
Loc: NE Ohio
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Gerd,
I sent you a personal message.
Larry
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Larry
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tim53
Pooh-Bah
Reged: 12/17/04
Posts: 1390
Loc: Highland Park, CA
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Gerd and others:
Come on down to my thread on ATM/DIY and comment on my building of an OTA for my 6" f/15 Jaegers!
My family is out of town for the weekend, so I'm frantically trying to get this done before they get back and I have to go to work on Monday!  
I'm having a blast, though.
Fireworks? What fireworks? Just don't anybody set all that sawdust on fire!
-Tim. 6" f/15 build
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"We`re just waiting looking skyward as the days come down.
Someone promised there`d be answers, if we stayed around."
-Orchestral Maneuvers in the Dark, "The Romance of the Telescope"
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mikey cee
Post Laureate
Reged: 01/18/07
Posts: 3496
Loc: bellevue ne.
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Gerd...I also have a Jaegers 6" f/8. On a good seeing night when pointing the scope at Vega my image looks very similar to a perfect set of Newtons Rings under a flourecent light.  Mike
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7x35 and 10x50 sears tower binocs, 3" f/10 edmunds reflector, 2.4" f/11.7 manon refractor, 6" f/8 jaegers refractor, "The 8 Ball" 8" f/13.3 brandt refractor, 3" f/15.8 sans&streiffe refractor, 3.1" f/15 selsi refractor(towa 339), 2.4" f/15 sears refractor, selsi 30x30mm spyglass, criterion 5-draw 25x45x75x spyglass(1957), 4.25" f/14.8 tasco 20te.
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