View previous topic :: View next topic |
Author |
Message |
kds315*
Joined: 12 Mar 2008 Posts: 16497 Location: Weinheim, Germany
Expire: 2021-03-09
|
Posted: Thu Sep 15, 2016 7:37 am Post subject: Singer Librascope f1.8 300mm mirror lens |
|
|
kds315* wrote:
Seen here Click here to see on Ebay
a very interesting fast mirror lens, most likely used for missile tracking.
(c) shphoto.eu _________________ 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 |
|
|
Boris_Akunin
Joined: 22 Aug 2013 Posts: 393 Location: Bremen, Germany
|
Posted: Thu Sep 15, 2016 7:43 am Post subject: |
|
|
Boris_Akunin wrote:
_________________ Sony: A7 | Samyang FE 35/2.8 | Sony FE 85/1.8
Pentax: K-5 | K28/3.5 | M50/1.7 | DA18-135/3.5-5.6 | F35-70/3.5-4.5
Minolta: X-500 | XD | MD35/2.8 | MC50/1.4 | MD200/4 | MD75-150/4
Canon: nFD24/2.8 | nFD35/2 | nFD50/1.4 | nFD300/5.6 | nFD35-105/3.5
|
|
Back to top |
|
|
blotafton
Joined: 08 Aug 2013 Posts: 1534 Location: Sweden
|
Posted: Thu Sep 15, 2016 9:48 am Post subject: |
|
|
blotafton wrote:
Yes please! |
|
Back to top |
|
|
kds315*
Joined: 12 Mar 2008 Posts: 16497 Location: Weinheim, Germany
Expire: 2021-03-09
|
Posted: Thu Sep 15, 2016 3:17 pm Post subject: |
|
|
kds315* wrote:
Very fast mirror lenses are quite a nightmare to use, extremely shallow DOF _________________ 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 |
|
|
BurstMox
Joined: 04 Dec 2011 Posts: 1998 Location: France
Expire: 2016-08-02
|
Posted: Thu Sep 15, 2016 3:22 pm Post subject: |
|
|
BurstMox wrote:
Do you think it covers 24x36? _________________ Pierre
sovietlenses.fr
Soviet lenses Facebook group |
|
Back to top |
|
|
calvin83
Joined: 12 Apr 2009 Posts: 7547 Location: Hong Kong
|
Posted: Thu Sep 15, 2016 3:33 pm Post subject: |
|
|
calvin83 wrote:
Better get a Nikkor 300mm F2.0 if one need such fast lens. _________________ https://lensfever.com/
https://www.instagram.com/_lens_fever/
The best lens is the one you have with you. |
|
Back to top |
|
|
Boris_Akunin
Joined: 22 Aug 2013 Posts: 393 Location: Bremen, Germany
|
Posted: Thu Sep 15, 2016 8:00 pm Post subject: |
|
|
Boris_Akunin wrote:
BurstMox wrote: |
Do you think it covers 24x36? |
I rather doubt it... _________________ Sony: A7 | Samyang FE 35/2.8 | Sony FE 85/1.8
Pentax: K-5 | K28/3.5 | M50/1.7 | DA18-135/3.5-5.6 | F35-70/3.5-4.5
Minolta: X-500 | XD | MD35/2.8 | MC50/1.4 | MD200/4 | MD75-150/4
Canon: nFD24/2.8 | nFD35/2 | nFD50/1.4 | nFD300/5.6 | nFD35-105/3.5
|
|
Back to top |
|
|
Attila
Joined: 24 Feb 2007 Posts: 57839 Location: Hungary
Expire: 2021-11-18
|
Posted: Thu Sep 15, 2016 10:51 pm Post subject: |
|
|
Attila wrote:
kds315* wrote: |
Very fast mirror lenses are quite a nightmare to use, extremely shallow DOF |
Impossible to get sharp image for sure, even 300mm f4.5 Rubinar is pretty painful to use well in distance shoots.
For tracking don't need to have sharp image. _________________ -------------------------------
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
|
|
Back to top |
|
|
jamaeolus
Joined: 19 Mar 2014 Posts: 2913 Location: Eugene
Expire: 2015-08-20
|
Posted: Thu Sep 15, 2016 11:58 pm Post subject: |
|
|
jamaeolus wrote:
Out of curiosity, what is this lens designed for (mount and usage)? _________________ photos are moments frozen in time |
|
Back to top |
|
|
visualopsins
Joined: 05 Mar 2009 Posts: 10462 Location: California
Expire: 2021-06-22
|
Posted: Fri Sep 16, 2016 12:56 am Post subject: |
|
|
visualopsins wrote:
I think for tracking need damn good precise auto-focus!
Why does nobody introduce fast mirror with micrometer adjustment of focus ring? Focus "throw" too short usual problem... _________________ ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony A7Rii, Spotmatics II, F, and ESII, Nikon P4
M42 Asahi Optical Co., Lenses:
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
Other lenses:
Carl Zeiss Jena Flektogon 2.4/35
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
|
|
Back to top |
|
|
kds315*
Joined: 12 Mar 2008 Posts: 16497 Location: Weinheim, Germany
Expire: 2021-03-09
|
Posted: Fri Sep 16, 2016 6:45 am Post subject: |
|
|
kds315* wrote:
Excellent Find!!!
So there have been three such high-speed, high - resolution catadioptric lenses:
300mm f/1.8, 500mm f/3.25, and 600mm f/1.8
made to fit a two-stage image intensifier system, which most likely had 15mm resp.
25mm image diamater, meaning the lens was also designed to only cover such small circles.
Here someone testing such an early system at night, not very convincing: https://www.youtube.com/watch?v=A0QacQKbv3E
Found an image of such a night vision system:
as as coincidence just wants it, here is one for sale Click here to see on Ebay
Here from the Bievre Camera Show 2008, someone testing the 500mm version of it
which was mentioned to be in Exakta mount (!?) and strangely enough has the same serial number 1027
as the one auctioned f1.8/300mm on ebay now (??)
So, enough "Lens Sherlock" work .... _________________ 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
Last edited by kds315* on Sun Sep 18, 2016 12:03 am; edited 1 time in total |
|
Back to top |
|
|
visualopsins
Joined: 05 Mar 2009 Posts: 10462 Location: California
Expire: 2021-06-22
|
Posted: Sat Sep 17, 2016 6:48 pm Post subject: |
|
|
visualopsins wrote:
visualopsins wrote: |
...
Why does nobody introduce fast mirror with micrometer adjustment of focus ring? Focus "throw" too short usual problem... |
Quoting myself, I know.
Some background for the idea. In 1970s I was Electronics Technician working on Instrumentation. The oscilloscopes of that time had manual dials for some adjustments. The potentiometers were limited to about 300 degrees of turn. To make fine adjustments, the knobs actually had inside little transmissions with differential gears -- a big turning of the knob would make a tiny turning of the adjustment potentiometer.
The idea seems simple enough to implement on mirror lens. The big diameter focus rings could be turned by a tiny knob -- knob is geared into the focus ring -- many turns of little knob turns focus ring tiny amount... _________________ ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony A7Rii, Spotmatics II, F, and ESII, Nikon P4
M42 Asahi Optical Co., Lenses:
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
Other lenses:
Carl Zeiss Jena Flektogon 2.4/35
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
|
|
Back to top |
|
|
Gerald
Joined: 25 Mar 2014 Posts: 1196 Location: Brazil
|
Posted: Sat Sep 17, 2016 8:24 pm Post subject: |
|
|
Gerald wrote:
visualopsins wrote: |
In 1970s I was Electronics Technician working on Instrumentation. |
Really, buddy? I know one or two things about electronic instrumentation, too.
Microscopes have a fine and a coarse adjustment of focus. Very practical. Supertelephoto lenses would also benefit from a focusing system similar to the microscopes.
Regarding the Singer Librascope, since it was used to track distant objects, the focus shouldn't be as critical as it seems at first sight. For example, when a 300mm F1.8 lens is focused to a distance of 5000 m, the depth of field extends from 2500m to infinity (for a confusion circle of 0.01mm). This means that the Singer Librascope could operate with fixed focus in many practical situations!
Great find, Klaus! The lens is yours? _________________ If raindrops were perfect lenses, the rainbow did not exist. |
|
Back to top |
|
|
visualopsins
Joined: 05 Mar 2009 Posts: 10462 Location: California
Expire: 2021-06-22
|
Posted: Sat Sep 17, 2016 9:58 pm Post subject: |
|
|
visualopsins wrote:
Gerald wrote: |
visualopsins wrote: |
In 1970s I was Electronics Technician working on Instrumentation. |
Really, buddy? I know one or two things about electronic instrumentation, too. |
Temperature-compensated precision 5-1/2 digit dual-slope integrating multi-meters, high-speed frequency counters & pulse generators, precision voltage references used for calibrating other instruments, microwave frequency generators for calibrating other communication devices... _________________ ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony A7Rii, Spotmatics II, F, and ESII, Nikon P4
M42 Asahi Optical Co., Lenses:
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
Other lenses:
Carl Zeiss Jena Flektogon 2.4/35
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
|
|
Back to top |
|
|
kds315*
Joined: 12 Mar 2008 Posts: 16497 Location: Weinheim, Germany
Expire: 2021-03-09
|
Posted: Sat Sep 17, 2016 11:59 pm Post subject: |
|
|
kds315* wrote:
Gerald wrote: |
visualopsins wrote: |
In 1970s I was Electronics Technician working on Instrumentation. |
Really, buddy? I know one or two things about electronic instrumentation, too.
Microscopes have a fine and a coarse adjustment of focus. Very practical. Supertelephoto lenses would also benefit from a focusing system similar to the microscopes.
Regarding the Singer Librascope, since it was used to track distant objects, the focus shouldn't be as critical as it seems at first sight. For example, when a 300mm F1.8 lens is focused to a distance of 5000 m, the depth of field extends from 2500m to infinity (for a confusion circle of 0.01mm). This means that the Singer Librascope could operate with fixed focus in many practical situations!
Great find, Klaus! The lens is yours? |
You did not read all through I guess. I was used as a night vision system front lens for police enforcement
and users complaint that it was impossible to focus correctly to moving cars!
It is an ebay ad of a professional seller, of course not mine. _________________ 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 |
|
|
Gerald
Joined: 25 Mar 2014 Posts: 1196 Location: Brazil
|
Posted: Sun Sep 18, 2016 12:45 am Post subject: |
|
|
Gerald wrote:
visualopsins wrote: |
Temperature-compensated precision 5-1/2 digit dual-slope integrating multi-meters, high-speed frequency counters & pulse generators, precision voltage references used for calibrating other instruments, microwave frequency generators for calibrating other communication devices... |
That's very cool! All the techniques you mentioned are very interesting and familiar to me. Because the last thing I want is going off-topic, I'll mention just one subject I worked on recently: FM-CW short-range radar.
Going back to topic, just out of curiosity I searched the specifications of one of the most famous telescopes in the world, the 200-inch Hale Telescope on Palomar Mountain:
Focal lenght (Cassegrain focus): 81,300 mm
Aperture: F16
Focal lenght (coudé focus): 152,000 mm
Aperture: F30
The apertures not very impressive, but the focal lengths, oh my God! _________________ If raindrops were perfect lenses, the rainbow did not exist. |
|
Back to top |
|
|
Gerald
Joined: 25 Mar 2014 Posts: 1196 Location: Brazil
|
Posted: Sun Sep 18, 2016 12:57 am Post subject: |
|
|
Gerald wrote:
kds315* wrote: |
You did not read all through I guess. I was used as a night vision system front lens for police enforcement
and users complaint that it was impossible to focus correctly to moving cars!
|
Yes, police use certainly is not a good application for this lens. I based my comments on the following information:
kds315* wrote: |
a very interesting fast mirror lens, Most Likely used for missile tracking. |
Quote: |
The primary function of the Mk 37 NVS is long-range observation, such as enemy surveillance and target detection. |
_________________ If raindrops were perfect lenses, the rainbow did not exist. |
|
Back to top |
|
|
kds315*
Joined: 12 Mar 2008 Posts: 16497 Location: Weinheim, Germany
Expire: 2021-03-09
|
Posted: Sun Sep 18, 2016 10:07 am 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 |
|
|
xaprb
Joined: 28 Jan 2021 Posts: 168
|
Posted: Fri Jun 10, 2022 12:48 pm Post subject: |
|
|
xaprb wrote:
This is an old thread, but it seems right to continue it, because I think the same lens that has been previously mentioned is now for sale again on eBay: https://www.ebay.com/itm/295031157673
Serial number 1027, 300mm f1.8
I don’t see photos from the original post anymore, so I suspect they were lost when the forum was upgraded or something. I’ll post some of the listing photos. The seller is selling it combined with a Sony A7 and some custom-made adapters. In some research, I found that this lens was designed to be used with a light-amplification device, very different from being adapted to a mirrorless camera. The amplification devices are not part of this item being sold.
A resource I found is on Google Books; an evaluation of the system being used for police work; it was rejected as unworkable.
https://books.google.com/books?id=Jf5F3_qMMwAC&q=singer+librascope
I also found Librascope ex-employees have scanned and archived company newsletters (internal, I guess) but I didn’t yet see this lens mentioned in any of them.
https://www.evernote.com/pub/4sorenca/librascopesearch
|
|
Back to top |
|
|
eggplant
Joined: 27 May 2020 Posts: 516
|
Posted: Fri Jun 10, 2022 1:47 pm Post subject: |
|
|
eggplant wrote:
US $3400
Just read again and realised the camera is included - but it's a first generation Sony A7.
Even with it included not sure how it's worth this much... then again they are selling projection lenses which go for $99 stuck in helicoids for $400... https://www.ebay.com/itm/FAST-140mm-1-8-lens-for-Pentax-6x7-67-Aero-Ektar-Mamiya-645-GFX-135-165-Cinelux
Out of sheer coincidence I archived a listing for a Librascope 300mm and 500mm that had been going unsold for ages. They eventually came to as low as £150 for the 300mm one- no kidding. Then they sold.
https://archive.ph/zwbrD 300mm
https://archive.ph/zEFfg 500mm
With all that out of the way...
I am curious how you found this evernote website- never heard of it, who shared this?
As for information, I can find this specific model and the others offered as a lens for 35mm SLRs, motion picture and TV cameras in 1970-1971:
The reference is for this:
Industrial Photography 1970-09: Vol 19 Iss 9 p.90
Popular Photography 1970-11: Vol 67 Iss 5 p.17
Journal of the SMPTE 1971-05: Vol 80 Iss 5 p.367 |
|
Back to top |
|
|
xaprb
Joined: 28 Jan 2021 Posts: 168
|
Posted: Fri Jun 10, 2022 2:37 pm Post subject: |
|
|
xaprb wrote:
I found that Evernote archive via https://www.librascopememories.com/ |
|
Back to top |
|
|
xaprb
Joined: 28 Jan 2021 Posts: 168
|
|
Back to top |
|
|
eggplant
Joined: 27 May 2020 Posts: 516
|
Posted: Fri Jun 10, 2022 6:55 pm Post subject: |
|
|
eggplant wrote:
Ahhh didn't navigate to that part... very interesting. This website seems very well documented.
Will have to see if they patented anything next... |
|
Back to top |
|
|
europanorama
Joined: 27 May 2012 Posts: 128
|
Posted: Sat Oct 15, 2022 2:11 am Post subject: AF-go Contax AX even Vivitar 600/8 is working since Catad. |
|
|
europanorama wrote:
For AF use it on Contax AX even slow F8 vivitar 600/8 cat is working since catadioptic. i tested it. _________________ mpa |
|
Back to top |
|
|
eggplant
Joined: 27 May 2020 Posts: 516
|
Posted: Sat Oct 15, 2022 9:47 am Post subject: |
|
|
eggplant wrote:
What do you mean by "since catadioptric"? Do you mean that optical design has something to do with autofocus capability?
I have some ideas but won't put words in your mouth. _________________ UK |
|
Back to top |
|
|
|