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fourbillionyears
Joined: 12 May 2016
Posts: 106
Location: USA
Expire: 2017-10-04
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 Posted: Tue Dec 03, 2019 5:37 pm Post subject: Concave wonder - Ultron 50mm |
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fourbillionyears wrote:
Carl Zeiss Ultron 50mm f/1.8 and Sony FF.
I read somewhere that this is not the only lens with a concave front element, but I can't find any reference to any other such lens. Does anybody have any insight on this? Regardless, this lens is from a different planet: because of the concave front element, because of its name, and more than anything because of image quality....
More pictures here: https://fourbillionyears.org/carl-zeiss-ultron-50mm-f-1-8/
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Alberto
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wolfhansen
Joined: 06 Oct 2013
Posts: 511
Location: Germany, Ruhr Area
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| Posted: Tue Dec 03, 2019 5:46 pm Post subject: |
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wolfhansen wrote:
I love this lens! 
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Wolfgang |
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kds315*
Joined: 12 Mar 2008
Posts: 16541
Location: Weinheim, Germany
Expire: 2021-03-09
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| Posted: Tue Dec 03, 2019 7:00 pm Post subject: |
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kds315* wrote:
Yeah, W A Tronnier's masterpiece! happy to have one fro long, too!!
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"S'il vient a point, me souviendra" [Thomas Bohier (1460-1523)]
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http://photographyoftheinvisibleworld.blogspot.com/ my UV BLOG
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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
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fourbillionyears
Joined: 12 May 2016
Posts: 106
Location: USA
Expire: 2017-10-04
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| Posted: Wed Dec 04, 2019 3:21 am Post subject: |
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fourbillionyears wrote:
| kds315* wrote: |
| W A Tronnier's masterpiece! |
A masterpiece indeed! They don't make lenses like this any longer 
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Alberto
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visualopsins
Joined: 05 Mar 2009
Posts: 10532
Location: California
Expire: 2025-04-11
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| Posted: Wed Dec 04, 2019 3:55 am Post subject: |
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visualopsins wrote:
http://forum.mflenses.com/concave-lenses-list-t36591.html
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☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ 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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fourbillionyears
Joined: 12 May 2016
Posts: 106
Location: USA
Expire: 2017-10-04
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| Posted: Wed Dec 04, 2019 4:48 am Post subject: |
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fourbillionyears wrote:
| visualopsins wrote: |
| http://forum.mflenses.com/concave-lenses-list-t36591.html |
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Alberto
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uddhava
Joined: 22 Aug 2012
Posts: 3071
Location: Hungary
Expire: 2021-06-21
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| Posted: Wed Dec 04, 2019 8:11 am Post subject: |
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uddhava wrote:
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papasito
Joined: 09 Jan 2015
Posts: 1658
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| Posted: Thu Dec 05, 2019 10:20 pm Post subject: |
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papasito wrote:
Excellent!!!!!
Now. What about the flaring resistance?
IT's a single coat lens of the end of the 60's
Lateral CA?
I read that the sweet of the lens is from F/4 to f/8 as the average. Is it true?
The rendering of the Ultron and of the Rollei made planar 1,8/50 hft are the same? Any better?
Thank you |
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papasito
Joined: 09 Jan 2015
Posts: 1658
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| Posted: Thu Dec 05, 2019 10:23 pm Post subject: Re: Concave wonder - Ultron 50mm |
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papasito wrote:
| fourbillionyears wrote: |
Carl Zeiss Ultron 50mm f/1.8 and Sony FF.
I read somewhere that this is not the only lens with a concave front element, but I can't find any reference to any other such lens. Does anybody have any insight on this? Regardless, this lens is from a different planet: because of the concave front element, because of its name, and more than anything because of image quality....
More pictures here: https://fourbillionyears.org/carl-zeiss-ultron-50mm-f-1-8/
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AFAIK, the canon 2/35 had it too. |
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wolfhansen
Joined: 06 Oct 2013
Posts: 511
Location: Germany, Ruhr Area
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| Posted: Fri Dec 06, 2019 12:05 pm Post subject: |
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wolfhansen wrote:
| papasito wrote: |
Excellent!!!!!
Now. What about the flaring resistance?
IT's a single coat lens of the end of the 60's
Lateral CA?
I read that the sweet of the lens is from F/4 to f/8 as the average. Is it true?
The rendering of the Ultron and of the Rollei made planar 1,8/50 hft are the same? Any better?
Thank you |
You can see some examples here:
http://forum.mflenses.com/request-test-info-summicron-r-50-vs-zenitar-50-1-7-t81077.html#1531185
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Wolfgang |
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fourbillionyears
Joined: 12 May 2016
Posts: 106
Location: USA
Expire: 2017-10-04
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| Posted: Sun Dec 08, 2019 6:49 pm Post subject: |
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fourbillionyears wrote:
| papasito wrote: |
Excellent!!!!!
Now. What about the flaring resistance?
IT's a single coat lens of the end of the 60's
Lateral CA?
I read that the sweet of the lens is from F/4 to f/8 as the average. Is it true?
The rendering of the Ultron and of the Rollei made planar 1,8/50 hft are the same? Any better?
Thank you |
I have not found flare to be a problem, at least not any worse than later T* coated lenses.
Regarding CA I have not been bothered by it, and it is in any way quite easy to fix during editing.
The lens is fantastic at any aperture - yes perhaps it is sharpest around f/5.6 (e.g., the B&W cat portrait), but even fully open it is magnificent
I have no experience with the Rollei lens, so can't comment on that.
I hope this helps!!
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Alberto
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papasito
Joined: 09 Jan 2015
Posts: 1658
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| Posted: Tue Dec 10, 2019 1:01 am Post subject: |
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papasito wrote:
Thank you |
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papasito
Joined: 09 Jan 2015
Posts: 1658
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| Posted: Tue Dec 10, 2019 1:01 am Post subject: |
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papasito wrote:
| fourbillionyears wrote: |
| papasito wrote: |
Excellent!!!!!
Now. What about the flaring resistance?
IT's a single coat lens of the end of the 60's
Lateral CA?
I read that the sweet of the lens is from F/4 to f/8 as the average. Is it true?
The rendering of the Ultron and of the Rollei made planar 1,8/50 hft are the same? Any better?
Thank you |
I have not found flare to be a problem, at least not any worse than later T* coated lenses.
Regarding CA I have not been bothered by it, and it is in any way quite easy to fix during editing.
The lens is fantastic at any aperture - yes perhaps it is sharpest around f/5.6 (e.g., the B&W cat portrait), but even fully open it is magnificent
I have no experience with the Rollei lens, so can't comment on that.
I hope this helps!! |
Thank you, very much |
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lumens pixel
Joined: 27 Feb 2019
Posts: 834
Expire: 2021-06-25
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| Posted: Mon Mar 02, 2020 10:40 pm Post subject: |
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lumens pixel wrote:
Very nice.
Probably also Canon EF M 22mm f2, 0.
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Lumens Pixel
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Minolta SR mount: 16 2,8; Sigma SuperWide 24 2,8; 28 2,5; 28 2,8; 28 3,5; 35 2,8; 45 2,0; 50 1,4; 50 1,7; 50 2,0; 58 1,4; 85 2,0; 100 2,5; 100 4 Macro; 135 3,5; 135 2,8; 200 4; RF 250 5,6; 24-35 3,5; 35-70 3,5; 75-150 4; 70-210 4
Canon FD mount: Tokina RMC 17 3,5; 28 2,8; 35 2,8; 50 1,8; 50 3,5 Macro; 55 1,2; 135 3,5; 135 2,5; 200 4,0; 300 5,6; 28-55 3,5 4,5; Tokina SZ-X SD 270; 70-150 4,5; 70-210 f4; 80-200 4L; Tokina SZ-X 845
Tamron Adaptall: 28-80 3,5-4,2 (27A); 70-210 3,8-4 (46A); 60-300 (23A); 90 2,5 (52B); 35-135 3,5-4,5 (40A)
Tamron SP: 20-40 2,7-3,5 (266D) |
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