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akfreak
Joined: 04 Feb 2010 Posts: 8 Location: las vegas
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Posted: Thu Apr 14, 2011 9:53 am Post subject: Anyone Ever seen this Lens before? If so What is it? |
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akfreak wrote:
I found what I think is a Really cool Aluminum zoom lens. I took it apart and it looks hand made but I am probably wrong. The lens has 2 cemented elements. Looks like a flat piece and a convex front, about 1" thich. In pencil it has 7474 written on the side of it I have to assume this is come sort of measurement in optics.
It had a piece of tape marking the aperture stops from 5.6 to f45. I make little marks in the alum with a pantograph engraver, so I have reference when I restore this baby.
The aperture is like an old preset Takumar but the blade design is way different. it Has 12 blades.
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The lens element does appear to have a slight coating on the rear of the optic, however the front it seems to of been worn off.
The mount looks like an old Leica screw mount (m39 I think)but not sure. I am thinking this is a old Cine lens, again just guessing. I know it has no value to anyone but me. I love old stuff like this. The craftsmanship is wonderful, They dont make stuff like this anymore.
I held it in front of my D70, Olympus e-1 and my 7d. It must be for 35mm it registers clear and focused images with the lens in almost the same position as the original factory lenses. |
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newton
Joined: 10 Mar 2011 Posts: 343 Location: USA
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Posted: Thu Apr 14, 2011 10:04 am Post subject: |
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newton wrote:
Where did you find it? How much id you pay for it? I think it looks pretty cool. Now give it to me. Congrats! |
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dimitrygo
Joined: 01 Apr 2009 Posts: 561
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Posted: Thu Apr 14, 2011 11:49 am Post subject: |
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dimitrygo wrote:
Looks like some prototype. |
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iangreenhalgh1
Joined: 18 Mar 2011 Posts: 15679
Expire: 2014-01-07
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Posted: Thu Apr 14, 2011 12:23 pm Post subject: |
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iangreenhalgh1 wrote:
I'd say that was an early TV camera lens. _________________ I don't care who designed it, who made it or what country it comes from - I just enjoy using it! |
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Attila
Joined: 24 Feb 2007 Posts: 57865 Location: Hungary
Expire: 2025-11-18
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Posted: Thu Apr 14, 2011 1:01 pm Post subject: |
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Attila wrote:
Looks a DIY item, I saw several item here locally and I have one too with same finish of barrel. _________________ -------------------------------
Items on sale on Ebay
Sony NEX-7 Carl Zeiss Planar 85mm f1.4, Minolta MD 35mm f1.8, Konica 135mm f2.5, Minolta MD 50mm f1.2, Minolta MD 250mm f5.6, Carl Zeiss Sonnar 180mm f2.8
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kansalliskala
Joined: 19 Jul 2007 Posts: 5039 Location: Southern Finland countryside
Expire: 2016-12-30
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Posted: Thu Apr 14, 2011 2:07 pm Post subject: |
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kansalliskala wrote:
Attila wrote: |
Looks a DIY item, I saw several item here locally and I have one too with same finish of barrel. |
Is that a Zenit m39 mount then? _________________ MF: Kodak DCS SLR/c; Samsung NX10; OM-10; Canon T50
Zuiko 28/3.5, Distagon 35/2.8; Yashica ML 50/2;
Zuiko 50/1.4; S-M-C 120/2.8; Zuiko 135/3.5; 200/5;
Tamron AD1 135/2.8, Soligor 180/3.5; Tamron AD1 300/5.6
Tamron zooms: 01A, Z-210
Yashicaflex C; Київ 4 + Юпитер 8, 11; Polaroid 100; Olympus XA; Yashica T3
Museum stuff: Certo-Phot; Tele-Edixon 135; Polaris 90-190; Asahi Bellows; Ixus IIs
Projects: Agfa Isolette III (no shutter), Canon AE-1D (no sensor),
Nikon D80 (dead), The "Peace Camera"
AF: Canon, Tokina, Sigma Video: JVC GZ-MG275E |
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luisalegria
Joined: 07 Mar 2008 Posts: 6602 Location: San Francisco, USA
Expire: 2018-01-18
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Posted: Thu Apr 14, 2011 2:30 pm Post subject: |
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luisalegria wrote:
Is there any glass on the other side of the diaphragm ?
If not its most likely a 2-element anastigmat. These were often used as log focal length lens designs as they can be very sharp in the center, with poor edges, but thats less signifcant if the design just uses the center of the coverage circle.
If the mount is M39 it may have been intended for a Leica Visoflex reflex mount.
There were a lot of military optics re-purposed as camera lenses by hobbyists in the 1950's. I have a couple of these myself, made apparently from artillery sights.
http://forum.mflenses.com/what-the-heck-is-this-thing-200and-f-5-lens-t6488,highlight,penntar.html
http://forum.mflenses.com/homemade-lens-200mm-f-5-6-former-military-item-t11103,highlight,%2Bhomemade.html
One of these at least probably came from this -
http://www.usmilitariaforum.com/forums/lofiversion/index.php/t6367.html
I have seen others; as one can expect these are all unique. The most common mount seems to be Exakta, which makes sense as that was THE slr of the 1940's-early 50's. I have also seen M42. M39 Visoflex on one of these would be a new one to me, but not unlikely.
Yours is much better made than the ones I have. Someone with a proper machine shop and good skills made yours. _________________ I like Pentax DSLR's, Exaktas, M42 bodies of all kinds, strange and cheap Japanese lenses, and am dabbling in medium format/Speed Graphic work. |
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akfreak
Joined: 04 Feb 2010 Posts: 8 Location: las vegas
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Posted: Fri Apr 15, 2011 8:04 am Post subject: |
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akfreak wrote:
newton wrote: |
Where did you find it? How much id you pay for it? I think it looks pretty cool. Now give it to me. Congrats! |
5 Bucks, is what I paid. It only had a single doublet in the front, I will make a video showing its complete tear down and show you what it is exactly.
@ luisalegria
it is a 2 element lens with 7474 in pencil on the side. The total element is around 1" thick, it sits in front of the aperture. It has a thin convex element cemented on what appears to be a flat cylinder. No concave rear elements just flat.
The rear of the elements looks to be coated. If the lens mounts up ok to my dlsr, (have some m30 to m43 adapters on the way) I want to have the lens polished, it has lots of rub marks not actual scratches but you can see where it has been cleaned lots of times.
The center of the images looking thru, just held up to my Nikon d70 is tac sharp at 5.6. Cant imagine what f 45 looks like, lol |
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M. Valdemar
Joined: 14 Nov 2008 Posts: 93
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Posted: Fri Apr 15, 2011 11:31 am Post subject: |
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M. Valdemar wrote:
It is not a "zoom" lens. It may be a telephoto, but that doesn't make it a "zoom". |
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Seele
Joined: 17 Apr 2009 Posts: 742 Location: Sydney Australia
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Posted: Fri Apr 15, 2011 6:28 pm Post subject: |
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Seele wrote:
luisalegria wrote: |
Is there any glass on the other side of the diaphragm ?
If not its most likely a 2-element anastigmat. These were often used as log focal length lens designs as they can be very sharp in the center, with poor edges, but thats less signifcant if the design just uses the center of the coverage circle.. |
luis,
You cannot correct astigmatism with two elements. |
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luisalegria
Joined: 07 Mar 2008 Posts: 6602 Location: San Francisco, USA
Expire: 2018-01-18
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Posted: Fri Apr 15, 2011 7:51 pm Post subject: |
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luisalegria wrote:
Ooops !
I meant Achromatic.
Like a refracting telescope lens. _________________ I like Pentax DSLR's, Exaktas, M42 bodies of all kinds, strange and cheap Japanese lenses, and am dabbling in medium format/Speed Graphic work. |
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iangreenhalgh1
Joined: 18 Mar 2011 Posts: 15679
Expire: 2014-01-07
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Posted: Sat Apr 16, 2011 1:35 am Post subject: |
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iangreenhalgh1 wrote:
I still say it could be an early TV camera lens, I have seen similarly homemade seeming lenses at the National Museum of Photography, Film and Television in Bradford, very thick, solid plain aluminium barrels like that. No idea what the optic formulas were but they were usually a small number of elements and were designed for max sharpness in the centre of the frame wide open as early TV cameras were very insensitive, they didn't care about corner sharpness. _________________ I don't care who designed it, who made it or what country it comes from - I just enjoy using it!
Last edited by iangreenhalgh1 on Sat Apr 16, 2011 4:06 am; edited 1 time in total |
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visualopsins
Joined: 05 Mar 2009 Posts: 11011 Location: California
Expire: 2025-04-11
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Posted: Sat Apr 16, 2011 3:15 am Post subject: |
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visualopsins wrote:
Nice piece, whatever it is! A lot of work in the design and in the making, but doesn't look like any lens I know. The front isn't coated? Do you think the lens group is reversed, that the coating should be front? _________________ ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
Lenses:
M42 Asahi Optical Co., Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200, Tele-Takumar 1:5.6/200, 1:6.3/300, Macro-Takumar 1:4/50, Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm, Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element), Super-Multi-Coated Fisheye-TAKUMAR 1:4/17, Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500, Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100, Super-Multi-Coated Bellows-TAKUMAR 1:4/100, SMC TAKUMAR 1:1.4/50, 1:1.8/55
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX-A ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (151B), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
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kansalliskala
Joined: 19 Jul 2007 Posts: 5039 Location: Southern Finland countryside
Expire: 2016-12-30
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Posted: Sat Apr 16, 2011 8:44 am Post subject: |
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kansalliskala wrote:
iangreenhalgh1 wrote: |
I still say it could be an early TV camera lens, I have seen similarly homemade seeming lenses at the National Museum of Photography, Film and Television in Bradford, very thick, solid plain aluminium barrels like that. No idea what the optic formulas were but they were usually a small number of elements and were designed for max sharpness in the centre of the frame wide open as early TV cameras were very insensitive, they didn't care about corner sharpness. |
Why would someone DIY an early TV-camera lens? Were the cameras DIY too? _________________ MF: Kodak DCS SLR/c; Samsung NX10; OM-10; Canon T50
Zuiko 28/3.5, Distagon 35/2.8; Yashica ML 50/2;
Zuiko 50/1.4; S-M-C 120/2.8; Zuiko 135/3.5; 200/5;
Tamron AD1 135/2.8, Soligor 180/3.5; Tamron AD1 300/5.6
Tamron zooms: 01A, Z-210
Yashicaflex C; Київ 4 + Юпитер 8, 11; Polaroid 100; Olympus XA; Yashica T3
Museum stuff: Certo-Phot; Tele-Edixon 135; Polaris 90-190; Asahi Bellows; Ixus IIs
Projects: Agfa Isolette III (no shutter), Canon AE-1D (no sensor),
Nikon D80 (dead), The "Peace Camera"
AF: Canon, Tokina, Sigma Video: JVC GZ-MG275E |
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iangreenhalgh1
Joined: 18 Mar 2011 Posts: 15679
Expire: 2014-01-07
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Posted: Sat Apr 16, 2011 8:57 am Post subject: |
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iangreenhalgh1 wrote:
No, not saying they were diy made but that they had a crude look to them like that lens has. _________________ I don't care who designed it, who made it or what country it comes from - I just enjoy using it! |
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