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dof
Joined: 04 Feb 2009 Posts: 339 Location: Southern California
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Posted: Sat Aug 08, 2009 11:24 pm Post subject: Cassar, Cassarit, Cassaron |
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dof wrote:
I know (or I think I know) that the Steinheil Cassar is a triplet.
Anyone know about the designs of the Cassarit and Cassaron lenses? |
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scsambrook
Joined: 29 Mar 2009 Posts: 2167 Location: Glasgow Scotland
Expire: 2011-11-18
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Posted: Sun Aug 09, 2009 1:42 pm Post subject: Steinheil lenses |
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scsambrook wrote:
"Cassar, Cassarit, Cassaron ..." reminds me of learning latin at school all those years ago "amo, amas, amat..." - !
I always thought the Cassars were triplets, the Cassarits were 4-glass triplets, and the Cassarons were either symmetricals or Sonnar-types. But I've just looked in my copy of Cox's "Optics" and he says the Cassars were FIVE element triplet derivatives and the Cassaron the simple 3-glass types. I think for once in his life he might be wrong there. Time for more learned MF Lens members to add to the font of human knowledge - ! _________________ Stephen
Equipment: Pentax DSLR for casual shooting, Lumix G1 and Fuji XE-1 for playing with old lenses, and Leica M8 because I still like the optical rangefinder system. |
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Seele
Joined: 17 Apr 2009 Posts: 741 Location: Sydney Australia
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Posted: Sun Aug 09, 2009 4:04 pm Post subject: Re: Steinheil lenses |
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Seele wrote:
scsambrook wrote: |
"Cassar, Cassarit, Cassaron ..." reminds me of learning latin at school all those years ago "amo, amas, amat..." - !
I always thought the Cassars were triplets, the Cassarits were 4-glass triplets, and the Cassarons were either symmetricals or Sonnar-types. But I've just looked in my copy of Cox's "Optics" and he says the Cassars were FIVE element triplet derivatives and the Cassaron the simple 3-glass types. I think for once in his life he might be wrong there. Time for more learned MF Lens members to add to the font of human knowledge - ! |
Stephen,
That is not necessarily true: it's a common practise for lens manufacturers to re-use lens names for different constructions, even for Zeiss, the Sonnar was originally a Contessa-Nettel name, then recycled for those for the Contax; the Biogon was an assymetrical lens for the Contax and then the name was reused for a large-format wide-angle lens. |
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scsambrook
Joined: 29 Mar 2009 Posts: 2167 Location: Glasgow Scotland
Expire: 2011-11-18
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Posted: Sun Aug 09, 2009 5:02 pm Post subject: Re: Steinheil lenses |
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scsambrook wrote:
Seele wrote: |
Stephen,
That is not necessarily true: it's a common practise for lens manufacturers to re-use lens names for different constructions, even for Zeiss, the Sonnar was originally a Contessa-Nettel name, then recycled for those for the Contax; the Biogon was an assymetrical lens for the Contax and then the name was reused for a large-format wide-angle lens. |
Ah! A good point - and it restores my faith in Arthur Cox ! _________________ Stephen
Equipment: Pentax DSLR for casual shooting, Lumix G1 and Fuji XE-1 for playing with old lenses, and Leica M8 because I still like the optical rangefinder system. |
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dof
Joined: 04 Feb 2009 Posts: 339 Location: Southern California
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Posted: Mon Aug 10, 2009 5:13 pm Post subject: Re: Steinheil lenses |
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dof wrote:
scsambrook wrote: |
"Cassar, Cassarit, Cassaron ..." reminds me of learning latin at school all those years ago "amo, amas, amat..." - !
I always thought the Cassars were triplets, the Cassarits were 4-glass triplets, and the Cassarons were either symmetricals or Sonnar-types. But I've just looked in my copy of Cox's "Optics" and he says the Cassars were FIVE element triplet derivatives and the Cassaron the simple 3-glass types. I think for once in his life he might be wrong there. Time for more learned MF Lens members to add to the font of human knowledge - ! |
Thanks for the info.
Question:
When you say 4-glass triplet, do you mean a cemented pair plus 2 additional
air-spaced elements? |
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kds315*
Joined: 12 Mar 2008 Posts: 16552 Location: Weinheim, Germany
Expire: 2021-03-09
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Posted: Thu Oct 09, 2014 8:38 am Post subject: |
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kds315* wrote:
Just for teh record: http://camera-wiki.org/wiki/Steinheil
It is a triplet lens _________________ 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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Mos6502
Joined: 20 Jun 2011 Posts: 961 Location: Austin
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Posted: Thu Oct 09, 2014 3:23 pm Post subject: |
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Mos6502 wrote:
I think I remember reading somewhere that the Cassarit name was invented when the Cassar was recalculated (to be "color corrected"). Apparently the Cassar had a poor reputation in its own time, and the Cassarit was supposed to be much improved.
The Auto-Cassaron seems to be a different design again (but also a triplet) the one I had could not outperform a Domiplan, although it looked very pretty!
So while they are all triplets, they are not all the same design. |
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