View previous topic :: View next topic |
Author |
Message |
blotafton
Joined: 08 Aug 2013 Posts: 1552 Location: Sweden
|
Posted: Tue Feb 04, 2020 5:37 pm Post subject: Wollensak Oscillo-Anastigmat 75mm f/1.9 |
|
|
blotafton wrote:
I found a strange Fairchild Polaroid oscilloscope camera for sale online for a very low price. The lens on it turned out to be a beautiful piece of engineering. It feels well made and is heavy, 418g. And has 15 aperture blades if I counted correctly. Unlike the similar lens called Raptar this Anastigmat has a more or less flat field and normal bokeh which makes it usable for taking photos. The arm that cocks the shutter seems to be broken or turned inside the lens, which is strange. I managed to arm it by inserting a a tiny screwdriver.
I find the images it makes as beautiful as the lens itself. It has low contrast and ok sharpness all the way out to the edges. According the blog spiral-m42.blogspot.com the lens has a 6/4 design. And my test photos look similar to a scaled up 6/4 normal lens. Almost like a Pancolar.
So far I don't have an adapter and have only taken pictures at f/1.9 due to the difficulty in changing the aperture while holding lens and camera together.
But I managed to get some photos to share with you.
If you have photos or interesting information feel free post here!
#1 The text at the top says Belongs To The Swedish Radio. What could they have used it for?
#2
#3
#4
#5
#6
#7
#8
#9
#10
#11
#12
#13
|
|
Back to top |
|
|
jamaeolus
Joined: 19 Mar 2014 Posts: 2927 Location: Eugene
Expire: 2015-08-20
|
Posted: Tue Feb 04, 2020 7:17 pm Post subject: |
|
|
jamaeolus wrote:
Now THAT is what I call nervous bokeh! Well done!
I saw another oscillo something 75 mm 1.9 on e-bay. What is the oscillo reference? _________________ photos are moments frozen in time |
|
Back to top |
|
|
blotafton
Joined: 08 Aug 2013 Posts: 1552 Location: Sweden
|
Posted: Tue Feb 04, 2020 7:22 pm Post subject: |
|
|
blotafton wrote:
jamaeolus wrote: |
Now THAT is what I call nervous bokeh! Well done!
I saw another oscillo something 75 mm 1.9 on e-bay. What is the oscillo reference? |
Thanks!
I guess that the name indicates that it's designed to take pictures of oscilloscope screens. |
|
Back to top |
|
|
alex ph
Joined: 16 Mar 2013 Posts: 1571
|
Posted: Tue Feb 04, 2020 10:09 pm Post subject: |
|
|
alex ph wrote:
Wow, what an interesting lens, thanks for sharing!
It makes think of the early XX century photos, with thin dof and artistic plasticity of the background. What makes the difference from a more modern double Gauss, is a sensibly weaker subject isolation, especially given the longer focal distance and the speed. That makes it close in character to projection triplets. But with some distinctive plasticity.
I easily imagine a pretty series of shots taken with this lens in BW. If you don't mind, I converted one of your shots as following:
|
|
Back to top |
|
|
kds315*
Joined: 12 Mar 2008 Posts: 16541 Location: Weinheim, Germany
Expire: 2021-03-09
|
Posted: Tue Feb 04, 2020 11:15 pm Post subject: |
|
|
kds315* wrote:
_________________ Klaus - Admin
"S'il vient a point, me souviendra" [Thomas Bohier (1460-1523)]
http://www.macrolenses.de for macro and special lens info
http://www.pbase.com/kds315/uv_photos for UV Images and lens/filter info
https://www.flickr.com/photos/kds315/albums my albums using various lenses
http://photographyoftheinvisibleworld.blogspot.com/ my UV BLOG
http://www.travelmeetsfood.com/blog Food + Travel BLOG
https://galeriafotografia.com Architecture + Drone photography
Currently most FAV lens(es):
X80QF f3.2/80mm
Hypergon f11/26mm
ELCAN UV f5.6/52mm
Zeiss UV-Planar f4/60mm
Zeiss UV-Planar f2/62mm
Lomo Уфар-12 f2.5/41mm
Lomo Зуфар-2 f4.0/350mm
Lomo ZIKAR-1A f1.2/100mm
Nikon UV Nikkor f4.5/105mm
Zeiss UV-Sonnar f4.3/105mm
CERCO UV-VIS-NIR f1.8/45mm
CERCO UV-VIS-NIR f4.1/94mm
CERCO UV-VIS-NIR f2.8/100mm
Steinheil Quarzobjektiv f1.8/50mm
Pentax Quartz Takumar f3.5/85mm
Carl Zeiss Jena UV-Objektiv f4/60mm
NYE OPTICAL Lyman-Alpha II f1.1/90mm
NYE OPTICAL Lyman-Alpha I f2.8/200mm
COASTAL OPTICS f4/60mm UV-VIS-IR Apo
COASTAL OPTICS f4.5/105mm UV-Micro-Apo
Pentax Ultra-Achromatic Takumar f4.5/85mm
Pentax Ultra-Achromatic Takumar f5.6/300mm
Rodenstock UV-Rodagon f5.6/60mm + 105mm + 150mm
|
|
Back to top |
|
|
blotafton
Joined: 08 Aug 2013 Posts: 1552 Location: Sweden
|
Posted: Wed Feb 05, 2020 12:11 pm Post subject: |
|
|
blotafton wrote:
alex ph wrote: |
Wow, what an interesting lens, thanks for sharing!
It makes think of the early XX century photos, with thin dof and artistic plasticity of the background. What makes the difference from a more modern double Gauss, is a sensibly weaker subject isolation, especially given the longer focal distance and the speed. That makes it close in character to projection triplets. But with some distinctive plasticity.
I easily imagine a pretty series of shots taken with this lens in BW. If you don't mind, I converted one of your shots as following:
[img]http://forum.mflenses.com/userpix/20202/6699_vollensak_75_19_bw_1.[/img] |
Now that turned up the artsy level!
Yes somewhat similar rendering to projection lenses, but much better sharpness out from the center. Also very similar to the Auto Yashinon 5cm f/2, apart from the shorter FL.
I actually made a portrait in BW that was not included in the first post. With little detail in the background it looks much smoother:
#1
|
|
Back to top |
|
|
luisalegria
Joined: 07 Mar 2008 Posts: 6627 Location: San Francisco, USA
Expire: 2018-01-18
|
Posted: Wed Feb 05, 2020 7:24 pm Post subject: |
|
|
luisalegria wrote:
For taking pictures of oscilloscope crt screens, to make a record of signal traces.
These were standard accessories for analog oscillosopes since the 1930's.
Swedish Radio certainly had an electronics lab, so why not.
I had one of these Wollensaks, and several others, Kodak and Ilex, and a couple of cameras, a Fairchild with a Polaroid back and a custom-made 1950's 4x5 unit used by Los Alamos labs (nuclear weapons research).
The Wollensak couldn't quite cover 6x6 at infinity, as I tested on my Speed Graphic. These lenses are designed for very close focus of course, where they would have much greater coverage.
They had to be fast lenses due to slow films and low light. _________________ 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. |
|
Back to top |
|
|
visualopsins
Joined: 05 Mar 2009 Posts: 10530 Location: California
Expire: 2025-04-11
|
Posted: Wed Feb 05, 2020 8:43 pm Post subject: |
|
|
visualopsins wrote:
My period in electronics began just after 'scopes acquired fast trigger circuitry which made the photo method largely obsolete. I don't remember seeing any of the cameras at the large corporation with hundreds of electronics engineers where I worked for several years.
Anastigmat means corrected for sa, coma, & astigmatism, i.e., the field is flat, not curved, like most (all?) Macro lenses.
The CA correction color balance seems biased toward green, as would be beneficial to photographing fast green traces...my guess. _________________ ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ 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)
|
|
Back to top |
|
|
alex ph
Joined: 16 Mar 2013 Posts: 1571
|
Posted: Wed Feb 05, 2020 10:04 pm Post subject: |
|
|
alex ph wrote:
Blotafton, in fact a very good sharpness, thin DOF and a large space for experiments with BW processing. Take all your pleasure in that!
P.S. With blotafton's permission I played with the shot to see how it stands exposure and contrast play. Boosted both to get stonger accent on the eyes.
|
|
Back to top |
|
|
blotafton
Joined: 08 Aug 2013 Posts: 1552 Location: Sweden
|
Posted: Thu Feb 06, 2020 7:38 pm Post subject: |
|
|
blotafton wrote:
alex ph wrote: |
Blotafton, in fact a very good sharpness, thin DOF and a large space for experiments with BW processing. Take all your pleasure in that!
P.S. With blotafton's permission I played with the shot to see how it stands exposure and contrast play. Boosted both to get stonger accent on the eyes.
|
For print this version would be the best choice, well done!
Thanks everyone for the input. @luisalegria yes you are right it's not that strange to have certain scientific equipment on a broadcasting company.
Too bad that it doesn't cover 6x6, it would be cool to put it on a Kiev 60. |
|
Back to top |
|
|
luisalegria
Joined: 07 Mar 2008 Posts: 6627 Location: San Francisco, USA
Expire: 2018-01-18
|
Posted: Fri Feb 07, 2020 1:15 am Post subject: |
|
|
luisalegria wrote:
On the matter of coverage, since this depends on how close you focus, it could be it does cover 6x6 at portrait distance.
This is an old trick in large format where coverage problems are always a big deal due to movements. The closer your subject the bigger the image circle.
Infinity focus probably is not the best use of this 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. |
|
Back to top |
|
|
benadamx
Joined: 25 Feb 2019 Posts: 329
|
Posted: Fri Feb 07, 2020 6:10 am Post subject: Re: Wollensak Oscillo-Anastigmat 75mm f/1.9 |
|
|
benadamx wrote:
blotafton wrote: |
If you have photos or interesting information feel free post here!
#1 The text at the top says Belongs To The Swedish Radio. What could they have used it for? |
possibly to confirm (and document, maybe for certification?) that their broadcast gear is operating properly and at the right frequencies, as seen here:
https://www.youtube.com/watch?v=y4Zt_LJX1Tc
i've seen similar monitors in the studio at the local college radio station
cool stuff! |
|
Back to top |
|
|
blotafton
Joined: 08 Aug 2013 Posts: 1552 Location: Sweden
|
Posted: Fri Feb 07, 2020 10:40 pm Post subject: Re: Wollensak Oscillo-Anastigmat 75mm f/1.9 |
|
|
blotafton wrote:
benadamx wrote: |
blotafton wrote: |
If you have photos or interesting information feel free post here!
#1 The text at the top says Belongs To The Swedish Radio. What could they have used it for? |
possibly to confirm (and document, maybe for certification?) that their broadcast gear is operating properly and at the right frequencies, as seen here:
https://www.youtube.com/watch?v=y4Zt_LJX1Tc
i've seen similar monitors in the studio at the local college radio station
cool stuff! |
Very cool and interesting thanks for posting! |
|
Back to top |
|
|
blotafton
Joined: 08 Aug 2013 Posts: 1552 Location: Sweden
|
Posted: Sat May 23, 2020 9:29 am Post subject: |
|
|
blotafton wrote:
New samples with spring greenery. Lovely rendering in my opinion.
#1 Flare test.
#2
#3
#4
#5
#6
#7
|
|
Back to top |
|
|
|
|
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
|