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dr.volkan
Joined: 14 Nov 2008
Posts: 436
Location: Turkey_istanbul
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 Posted: Mon Apr 02, 2018 9:37 am Post subject: Hugo Meyer goerlitz telemegor. 15cm/5.5???? |
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dr.volkan wrote:
Which format is this lens?
What is the crop factor at apsc?
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visualopsins
Joined: 05 Mar 2009
Posts: 10540
Location: California
Expire: 2025-04-11
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| Posted: Mon Apr 02, 2018 10:40 am Post subject: |
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visualopsins wrote:
Depends on aps-c sensor size. Canon is 1.6x; Nikon is 1.5x.
_________________
☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ 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 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 (51BB), 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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dr.volkan
Joined: 14 Nov 2008
Posts: 436
Location: Turkey_istanbul
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| Posted: Mon Apr 02, 2018 2:24 pm Post subject: |
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dr.volkan wrote:
Let say 1.5 |
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visualopsins
Joined: 05 Mar 2009
Posts: 10540
Location: California
Expire: 2025-04-11
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| Posted: Mon Apr 02, 2018 4:25 pm Post subject: |
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visualopsins wrote:
The crop factor for your camera is 1.5x? That makes this 15cm lens have same field of view as 15cm * 1.5 = 22.5cm lens would give on full frame camera.
Format can be guessed using image circle size as a guide. How big is the image circle? How big a format will it cover?
Since lens is mounted on bellows could be a macro lens or perhaps an adapted enlarger lens.
_________________
☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ 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 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 (51BB), 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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sergtum
Joined: 14 Nov 2016
Posts: 735
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| Posted: Mon Apr 02, 2018 5:14 pm Post subject: |
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sergtum wrote:
look this
http://www.earlyphotography.co.uk/site/entry_C213.html |
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ADDCollector
Joined: 06 Mar 2018
Posts: 18
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| Posted: Mon Apr 02, 2018 5:26 pm Post subject: |
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ADDCollector wrote:
| visualopsins wrote: |
The crop factor for your camera is 1.5x? That makes this 15cm lens have same field of view as 15cm * 1.5 = 22.5cm lens would give on full frame camera.
Format can be guessed using image circle size as a guide. How big is the image circle? How big a format will it cover?
Since lens is mounted on bellows could be a macro lens or perhaps an adapted enlarger lens. |
Probably not an enlarger lens.
When used in an enlarger the lens faces downward. Enlarger lenses are designed so that the f-stop numbers can be read in this position. This means the bottom of the f-stop numbers face the front of an enlarger lens.
The f-stop numbers in the picture face the rear of the lens. That means they're designed to be read by someone behind the lens, which should indicate a lens designed to be used on a camera.
(The above message was posted while I was composing my message. Apparently I'm VERY slow when typing.) |
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luisalegria
Joined: 07 Mar 2008
Posts: 6627
Location: San Francisco, USA
Expire: 2018-01-18
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| Posted: Mon Apr 02, 2018 8:08 pm Post subject: |
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luisalegria wrote:
I have a version of this in Exakta mount.
This was designed for full frame 35mm, such as on an Exakta SLR.
The lens was also produced in other mounts like medium-format for certain Exakta models, and cine mounts.
It's hard to say what your example is.
The optics should have pretty good coverage, but the mount may mask it.
_________________
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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luisalegria
Joined: 07 Mar 2008
Posts: 6627
Location: San Francisco, USA
Expire: 2018-01-18
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| Posted: Mon Apr 02, 2018 10:27 pm Post subject: |
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luisalegria wrote:
One version of the Telemegor 15cm. was made for the Vest Pocket (VP) Exakta, which used a 4x6.5cm format on 127 film.
That had a fairly short mount, but I don' think its this one.
Search for Telemegor 15cm VP Exakta and you should find some pictures.
This one looks like the lens head only off some early version of this lens, adapted for an Exakta bellows.
_________________
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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