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kds315*
Joined: 12 Mar 2008 Posts: 16544 Location: Weinheim, Germany
Expire: 2021-03-09
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Posted: Fri Dec 30, 2016 2:34 pm Post subject: Distagon C/Y 28mm f/2 vs SMC Pentax K 28mm f/2 |
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kds315* wrote:
Same optics, as proven by my friend Marco Cavina, based on patent literature and documents of Dr Glatzel, Zeiss' chief designed at that time
_________________ 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
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calvin83
Joined: 12 Apr 2009 Posts: 7554 Location: Hong Kong
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Posted: Fri Dec 30, 2016 3:45 pm Post subject: |
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calvin83 wrote:
_________________ https://lensfever.com/
https://www.instagram.com/_lens_fever/
The best lens is the one you have with you. |
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thebbm
Joined: 11 Dec 2013 Posts: 295 Location: France montpellier
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Posted: Fri Dec 30, 2016 3:49 pm Post subject: |
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thebbm wrote:
the pentax is identique to zeiss "holywood" 28mm f2
http://forum.mflenses.com/poor-mans-zeiss-distagon-28mm-f-2-hollywood-t16851.html |
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kds315*
Joined: 12 Mar 2008 Posts: 16544 Location: Weinheim, Germany
Expire: 2021-03-09
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Posted: Fri Dec 30, 2016 4:11 pm Post subject: |
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kds315* wrote:
exactly what I 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
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thebbm
Joined: 11 Dec 2013 Posts: 295 Location: France montpellier
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Posted: Fri Dec 30, 2016 7:13 pm Post subject: |
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thebbm wrote:
kds315* wrote: |
exactly what I wrote... |
Excatly this lens is very rare, i never see it on the used local market |
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fwcetus
Joined: 12 Jun 2015 Posts: 303 Location: New England
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Posted: Fri Dec 30, 2016 10:50 pm Post subject: Re: Distagon C/Y 28mm f/2 vs SMC Pentax K 28mm f/2 |
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fwcetus wrote:
kds315* wrote: |
Same optics, as proven by my friend Marco Cavina, based on patent literature and documents of Dr Glatzel, Zeiss' chief designed at that time |
Thanks, Klaus, for providing that graphic. Here's another one of Marco's images of the "Hollywood Twins", which combines the two lens diagrams, but also more clearly indicates the high-refractive glass elements.
[I am still in awe of the fact that fully two-thirds of the lens elements are ground from high refractive index glass -- this was quite a "deluxe" lens design.]
The above graphic was originally taken from an article in Italian by Marco Cavina -
SMC PENTAX 28mm f/2 : LA STORIA NON SCRITTA - http://www.marcocavina.com/articoli_fotografici/Pentax_28_2_M/00_pag.htm
And here's a Google machine translation of the above article into English (that works well enough) -
SMC PENTAX 28mm f/2 : HISTORY NOT [yet] WRITTEN - http://translate.google.com/translate?hl=en&sl=it&tl=en&u=http%3A%2F%2Fwww.marcocavina.com%2Farticoli_fotografici%2FPentax_28_2_M%2F00_pag.htm&sandbox=1
The article also indicates the relationship to the Pentax M 28/2 (which later became the A 28/2), which is NOT of the same lens design as the K 28/2.
[I should also point out that the current Zeiss Distagon 28/2 is also NOT the same lens as the original Distagon C/Y 28/2.] _________________ Fred
If you saw a fellow drowning, and you could either save him or photograph the event . . . What lens would you use ? |
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andk
Joined: 21 Feb 2015 Posts: 18
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Posted: Sun Jan 08, 2017 3:31 pm Post subject: |
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andk wrote:
Are you guys aware of any other famous designs from Zeiss or Leica that got copied?
Thanks! |
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thebbm
Joined: 11 Dec 2013 Posts: 295 Location: France montpellier
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Posted: Sun Jan 08, 2017 5:39 pm Post subject: |
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thebbm wrote:
minolta make a zoom in cooperation with leica , the rokkor md 35-70mm f3.5 constant macro version (check the macro).
Leica sold it far expensive than minolta but same optic design |
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kds315*
Joined: 12 Mar 2008 Posts: 16544 Location: Weinheim, Germany
Expire: 2021-03-09
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Posted: Sun Jan 08, 2017 8:08 pm Post subject: |
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kds315* wrote:
andk wrote: |
Are you guys aware of any other famous designs from Zeiss or Leica that got copied?
Thanks! |
What I mentioned was a cooperation, not copying.
But engineers often "borrow" ideas for own designs
(c) Marco Cavina _________________ 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
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fwcetus
Joined: 12 Jun 2015 Posts: 303 Location: New England
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Posted: Sun Jan 08, 2017 9:47 pm Post subject: |
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fwcetus wrote:
kds315* wrote: |
andk wrote: |
Are you guys aware of any other famous designs from Zeiss or Leica that got copied? Thanks! |
What I mentioned was a cooperation, not copying. But engineers often "borrow" ideas for own designs |
Yes. If you look carefully at the second paragraph of the article from Marco Cavina (links above), it's quite clear that it was a two-way cooperation (for a time).
BTW, if I'm reading Marco's words (at least the machine-translated-by-Google words) correctly, Zeiss had a hand in the design of the actual Pentax K-mount, as well as in the optics of the SMC K 28/2. Interesting... _________________ Fred
If you saw a fellow drowning, and you could either save him or photograph the event . . . What lens would you use ? |
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Lightshow
Joined: 04 Nov 2011 Posts: 3669 Location: Calgary
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Posted: Mon Jan 09, 2017 5:57 pm Post subject: |
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Lightshow wrote:
I have the K 28/2, wonderful lens.
andk wrote: |
Are you guys aware of any other famous designs from Zeiss or Leica that got copied?
Thanks! |
The Biotar 58/2 & 75/1.5 to copied by Helios 44 and 40 respectively.
And Minolta shared a few designs with Leica, 24/2.8, 35-70/3.4, and a few others. _________________ A Manual Focus Junky...
One photographers junk lens is an artists favorite tool.
My lens list
http://www.flickr.com/photos/lightshow-photography/ |
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rbelyell
Joined: 13 Oct 2009 Posts: 4269 Location: somewhere in the mountains of central NY
Expire: 2014-01-31
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Posted: Tue Jan 10, 2017 1:17 pm Post subject: |
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rbelyell wrote:
just out of curiosity if anyone knows: i recently bought the 'new' zeiss 28/2 in native zk (pentax) mount. is it the same optical formula as the contax 'hollywood'? it seems much more compact a lens than the original...
btw, ming thien called the new zk version the single best lens hes ever used. _________________ Epson RD1 + Elmarit 21/2.8; Summarit 50/1.5; Summarit 75/2.5; Elmar-c 90/4; Sankyo Komura 135/2.8, Hektor 135/4.5; Braun Paxina 29 6x6; Photax Boyer Paris; Holga 120 Pano
GREAT STUFF FOR SALE:
Contax T
Hasselblad XPan + 45/4, 90/4
Kodak Retina Reflex IV + full set of Schneider Krueznach lenses
Mercury 2 half frame 35mm
Kodak Pro slr/n
Fuji GM670+100/3.5+65/8!
Praktisix 6x6 medium format + ZeissBiometar 120/2.8
Bessa T 101 Anniversary Edition in Navy Blue
Mamiya Six Folder with Zuiko 75/3.5
Adaptall: Tamron SP 28-85 macro
Cameras: Canon IX
PM for more complete descriptions/pix. All in great shape!
_________________________
'buy me a drink, sing me a song,
take me as i come 'cause i can't stay long' |
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fwcetus
Joined: 12 Jun 2015 Posts: 303 Location: New England
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Posted: Tue Jan 10, 2017 1:53 pm Post subject: |
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fwcetus wrote:
rbelyell wrote: |
just out of curiosity if anyone knows: i recently bought the 'new' zeiss 28/2 in native zk (pentax) mount. is it the same optical formula as the contax 'hollywood'? it seems much more compact a lens than the original... |
The Zeiss (Cosina) ZK 28/2 is "similar" to the two "Hollywood" lenses, but is not identical -
_________________ Fred
If you saw a fellow drowning, and you could either save him or photograph the event . . . What lens would you use ? |
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stevemark
Joined: 29 Apr 2011 Posts: 3754 Location: Switzerland
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Posted: Wed Jan 11, 2017 4:02 pm Post subject: |
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stevemark wrote:
andk wrote: |
Are you guys aware of any other famous designs from Zeiss or Leica that got copied?
Thanks! |
The Zeiss 3.5/15mm was originally developped by Zeiss, and later found its way into the Pentax lens line-up, although slightly modified. It was also produced in a Leica R mount, as Elmarit-R 3.5/15mm.
The Minolta lenses 3.5/35-70mm (MD-I), MC 4.5/80-200mm, MD 4.5/75-200mm, MC 2.8/24mm as well as the Reflex 8/500mm were produced also in a Leica R mount, in Japan by Minolta - for Leica. The later MD-III 3.5/35-70mm as well as the MD-III 70-210mm were co-developped by Minolta and Leitz.
The Sigma 3.5-4.5/28-70mm was produced also also as Leica R 3.5-4.5/28-70mm.
The Zeiss 1.4/55mm for Contarex was probably copied by Mamiya, but i've never seen a real proof for that.
The Leica-R Shift lenses 4/35mm and 2.8/28mm are Schneider designs.
The lens section of the Zeiss C/Y 4/80-200mm and the lens section of the famous Leica-R 2.8/70-180mm are very similar - which can be easily unterstood since both lenses were designed by Lothar Kölsch (he first worked at Zeiss, later at Leitz).
The Zeiss Batis 1.8/85mm has the same lens section as the Tamron 1.8/85mm, and i would bet that Tamron has the patents, not Zeiss.
These are just a few that come to my mind - but I'm sure there are other examples for cooperation between Leitz, Zeiss and other companies.
Stephan _________________ www.artaphot.ch |
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fwcetus
Joined: 12 Jun 2015 Posts: 303 Location: New England
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Posted: Wed Jan 11, 2017 5:22 pm Post subject: |
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fwcetus wrote:
stevemark wrote: |
andk wrote: |
Are you guys aware of any other famous designs from Zeiss or Leica that got copied? |
The Zeiss 3.5/15mm was originally developped by Zeiss, and later found its way into the Pentax lens line-up, although slightly modified. |
Here are some details (some conjectural) of the relationship between the Zeiss and Pentax 15/3.5 lenses -
http://www.bdimitrov.de/kmp/lenses/primes/ultra-wide/K15f3.5-i.html _________________ Fred
If you saw a fellow drowning, and you could either save him or photograph the event . . . What lens would you use ?
Last edited by fwcetus on Thu Jan 12, 2017 4:16 pm; edited 1 time in total |
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paulhofseth
Joined: 05 Mar 2011 Posts: 566 Location: Norway
Expire: 2018-06-28
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Posted: Wed Jan 11, 2017 5:23 pm Post subject: minolta 800RF |
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paulhofseth wrote:
To the above list of Minolta optics for Leica R should be added the catadioptic 800mm which was also produced with the Leica R mount and had a brief listing in the official LeicaR optics table.
In contrast to the optics that Minolta produced on behalf of Leitz, this one just came out from the factory in Japan with the shorter R mount, but labelled "Minolta" rather than Leica.
A much more clearly advertised addition to the official list as well as to the brochures was the Angenieux zoom which also followed from an egreement with that factory. The two later Angenieux zooms with R-mount were not listed in the LeicaR lists.
p. |
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