dkCambridgeshire Posted May 31, 2014 Share #1 Posted May 31, 2014 Advertisement (gone after registration) I'm trying to find out more information about this lens e.g. original intended use and age. I suspect it might be a microscope lens because it is calibrated with numerical apertures. Some Leitz Summar and Milar macro lenses are calibrated with numerical aperture so it could be a macro lens? Also wondering if was intended for use with an Aristophot? Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! The lens is mounted into a 39mm adaptor via three screws. The lens elements are very clear and not hazy as they appear in the photos. I bought it because I am hoping that it might be suitable for UV photography - that's a big 'might' but will not know until I try. The lens appears to have no coating and might not have any cemented elements - thus might transmit UV light. My UV photography kit it is almost complete including a 35mm Noflexar and an 80mm El Nikkor but would also like to experiment with some suitable Leitz/Leica objectives. Any information about the lens would be appreciated. Best wishes dunk Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! The lens is mounted into a 39mm adaptor via three screws. The lens elements are very clear and not hazy as they appear in the photos. I bought it because I am hoping that it might be suitable for UV photography - that's a big 'might' but will not know until I try. The lens appears to have no coating and might not have any cemented elements - thus might transmit UV light. My UV photography kit it is almost complete including a 35mm Noflexar and an 80mm El Nikkor but would also like to experiment with some suitable Leitz/Leica objectives. Any information about the lens would be appreciated. Best wishes dunk ' data-webShareUrl='https://www.l-camera-forum.com/topic/228079-do-you-recognise-this-leitz-35mm-lens/?do=findComment&comment=2601200'>More sharing options...
Advertisement Posted May 31, 2014 Posted May 31, 2014 Hi dkCambridgeshire, Take a look here Do you recognise this Leitz 35mm lens?. I'm sure you'll find what you were looking for!
luigi bertolotti Posted May 31, 2014 Share #2 Posted May 31, 2014 Could be a Mikro Summar... the only Micro lens of 35mm length I can find within the many lenses of this kind that Leitz did during the years (Summar, Milar, Photar). It is listed in the 1939 catalog of Leitz NY (SUMAX / 549011) ; probably it is a 3 elements design, and covers some format larger than 35mm... but haven't other info about. Have found a vague reference here... microlen.htm And this picture... with a different and complete engraving... no idea if it is the same item : Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/228079-do-you-recognise-this-leitz-35mm-lens/?do=findComment&comment=2601282'>More sharing options...
dkCambridgeshire Posted May 31, 2014 Author Share #3 Posted May 31, 2014 Thank you Luigi. I was a bit hasty in not investigating the lens and its 39mm mount adaptor more closely ... and had not accessed my 42mm Micro Summar in its RMS thread mount adaptor. On closer examination the 35mm lens is not secured into the mount by the three screws. The three screws in the above photo actually secure an RMS threaded adaptor. The 35mm lens' RMS thread screws into the RMS thread adaptor within the 39mm mount. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! This is my RMS threaded 42mm Micro Summar in its mount - a similar mount to that in your illustration but yours has 'u' after 35 - whereas mine has 'u' after 42. The 35mm lens in your illustration is a Micro Summar. And this is the 'no name' Leitz 35mm screwed into the above mount. The front element perimeter is not damaged - the perimeter marks are flash reflections from the lens barrel interior. Thus quite likely that it is a 35mm Micro Summar … but for whatever reason was not engraved. My 24. 35. 42u. 50 mount does not have a 39mm outer male thread; it's a 40mm (approx) thread which screws into the Leitz 500 935 'R' bayonet adaptor Best wishes dunk Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! This is my RMS threaded 42mm Micro Summar in its mount - a similar mount to that in your illustration but yours has 'u' after 35 - whereas mine has 'u' after 42. The 35mm lens in your illustration is a Micro Summar. And this is the 'no name' Leitz 35mm screwed into the above mount. The front element perimeter is not damaged - the perimeter marks are flash reflections from the lens barrel interior. Thus quite likely that it is a 35mm Micro Summar … but for whatever reason was not engraved. My 24. 35. 42u. 50 mount does not have a 39mm outer male thread; it's a 40mm (approx) thread which screws into the Leitz 500 935 'R' bayonet adaptor Best wishes dunk ' data-webShareUrl='https://www.l-camera-forum.com/topic/228079-do-you-recognise-this-leitz-35mm-lens/?do=findComment&comment=2601386'>More sharing options...
jaapv Posted June 1, 2014 Share #4 Posted June 1, 2014 Sorry for the sidestep, The Summarit 1.5/5 cm is an excellent UV lens. Link to post Share on other sites More sharing options...
Pecole Posted June 1, 2014 Share #5 Posted June 1, 2014 Could be a Mikro Summar... the only Micro lens of 35mm length I can find within the many lenses of this kind that Leitz did during the years (Summar, Milar, Photar).It is listed in the 1939 catalog of Leitz NY (SUMAX / 549011) ; probably it is a 3 elements design, and covers some format larger than 35mm... but haven't other info about. Have found a vague reference here... microlen.htm And this picture... with a different and complete engraving... no idea if it is the same item : I fully agree with you, Luigi : it must be some kind of - maybe early - micro-Summar. It reminded me an unidentified Leitz lens I had in my drawers - photo hereunder - that I have always thought had something to do with microscopy or maybe an industrial application. Note the diaphragm actuating arm. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/228079-do-you-recognise-this-leitz-35mm-lens/?do=findComment&comment=2601657'>More sharing options...
dkCambridgeshire Posted June 1, 2014 Author Share #6 Posted June 1, 2014 Sorry for the sidestep, The Summarit 1.5/5 cm is an excellent UV lens. Thanks Jaap. In my UV imaging research I have accessed the Leica Forum UV photography threads including your contributions - all very interesting and informative. I may try a 5cm f1.5 Summarit when funds allow. At the moment I'm endeavouring to keep within budget; the cost of the Baader-U filter and Panasonic G1 full spectrum conversion have taken their toll and I still need a UV flashgun. The latter might be taken care of with an ancient PK ring flash but need to try it when actual experiments commence - when the G1 is received back after conversion. Looking back over the threads mentioning the Baader-U 320nm-380nm filter there appears to be no mention of the recommendation to reverse the filter for UV photography: All About Digital UV and IR. Page 6: Filters for UV … see paragraph commencing "Update: As of March 2007 " . I'm plucking up courage to remove the filter retaining ring and flip the actual filter - without scratching its 100 coatings Best wishes dunk Link to post Share on other sites More sharing options...
jaques Posted June 29, 2014 Share #7 Posted June 29, 2014 Advertisement (gone after registration) That second lens definitely looks like a Leitz Microscope part- my guess is some type of condenser? The first lens looks quite a bit like an early enlarger lens?? Link to post Share on other sites More sharing options...
dkCambridgeshire Posted June 29, 2014 Author Share #8 Posted June 29, 2014 That second lens definitely looks like a Leitz Microscope part- my guess is some type of condenser? The first lens looks quite a bit like an early enlarger lens?? Unlikely to be an enlarger lens as it has an RMS thread. dunk Link to post Share on other sites More sharing options...
Washington Posted July 7, 2014 Share #9 Posted July 7, 2014 Luigi, I have never seen such.... were some Mountings meant to use on a bellows ? Link to post Share on other sites More sharing options...
George Furst Posted December 10, 2014 Share #10 Posted December 10, 2014 I fully agree with you, Luigi : it must be some kind of - maybe early - micro-Summar. It reminded me an unidentified Leitz lens I had in my drawers - photo hereunder - that I have always thought had something to do with microscopy or maybe an industrial application. Note the diaphragm actuating arm. This looks like a sub stage condenser used in Leitz microscopy. I did a lot of microscopy when a graduate student in mineralogy and when I solved contamination problems while working in industry. This condenser sits directly under the stage and the lever controls the diaphragm and allows one to increase the contrast of the image. Very useful when trying to determine the index of refraction, a key way to identify the identity of a unknown mineral. Link to post Share on other sites More sharing options...
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