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no-X
Joined: 19 Jul 2008
Posts: 2495
Location: Budejky, Czech Republic
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 Posted: Sun Apr 26, 2009 5:25 pm Post subject: |
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no-X wrote:
Koji gave me an inspiration...
10 air/glass surfaces and macro capabilities = macro-plasmat
As Koji mentioned in another thread, Zeiss Macro Prakticar 55/2.8 is also based on this design:
But I'm not sure, which side is the front one.
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kds315*
Joined: 12 Mar 2008
Posts: 16663
Location: Weinheim, Germany
Expire: 2021-03-09
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| Posted: Sun Apr 26, 2009 6:31 pm Post subject: |
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kds315* wrote:
the left one...
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"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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no-X
Joined: 19 Jul 2008
Posts: 2495
Location: Budejky, Czech Republic
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| Posted: Sun Apr 26, 2009 6:53 pm Post subject: |
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no-X wrote:
Thank you. Left one for both Plasmat and Prakticar?
I'm asking because Volna 50/1.8 seems to use the same design, only reversed:
(if the left part is frontal too)
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no-X
Joined: 19 Jul 2008
Posts: 2495
Location: Budejky, Czech Republic
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| Posted: Wed Nov 25, 2009 11:07 pm Post subject: |
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no-X wrote:
I tried again the "flash-light test". Separately for front block and for rear block. Now I'm 99% sure, that Volna-9 is 6/5. In detail: 1-1-1|2-1 (it could be also 1-1-1|1-2, but that is highly unlikely).
It means, that Volna-9 has very likely the same basic optical diagram as other Volna lenses.
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no-X
Joined: 19 Jul 2008
Posts: 2495
Location: Budejky, Czech Republic
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| Posted: Fri Dec 11, 2009 3:32 pm Post subject: |
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no-X wrote:
Does anybody know optical diagram of Prakticar 50/2.4? I'm not sucessful with my search...
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kds315*
Joined: 12 Mar 2008
Posts: 16663
Location: Weinheim, Germany
Expire: 2021-03-09
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| Posted: Fri Dec 11, 2009 4:41 pm Post subject: |
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kds315* wrote:
Nope, haven't seen one yet. But I will get a Makro-Plasmat lens in a few days.
But since we're talking, has anyone ever seen one for the Carl Zeiss Jena Macro Floatar 2.8/35mm with floating element(s) (hence the name)??
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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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no-X
Joined: 19 Jul 2008
Posts: 2495
Location: Budejky, Czech Republic
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| Posted: Fri Dec 11, 2009 4:49 pm Post subject: |
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no-X wrote:
I'm looking forward to your macro-plasmat samples 
As for the Floatar, I have never heard about that lens 
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aoleg
Joined: 22 Feb 2008
Posts: 1387
Location: Berlin, DE
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| Posted: Fri Dec 11, 2009 9:56 pm Post subject: |
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aoleg wrote:
| no-X wrote: |
I tried again the "flash-light test". Separately for front block and for rear block. Now I'm 99% sure, that Volna-9 is 6/5. In detail: 1-1-1|2-1 (it could be also 1-1-1|1-2, but that is highly unlikely).
It means, that Volna-9 has very likely the same basic optical diagram as other Volna lenses. |
Someone on pentax-forums.ru has disassembled the lens, and here are his findings:
1. Front lens element - positive meniscus
2. Second lens - a strong negative element
3. Third lens - a highly curved, strong positive
(aperture)
4. Fourht element - a very thick element; most probably, a cemented group of two lenses; positive overall
5. Last, a positive convexo-convex element with stronger curve on the back.
So it does sound a lot like Volna-1 (50/1.8 ).
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no-X
Joined: 19 Jul 2008
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Location: Budejky, Czech Republic
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| Posted: Mon Dec 21, 2009 2:10 pm Post subject: |
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no-X wrote:
Thank you very much for these info. I'm really happy to read my guess was right 
Btw. I bought the Pentacon Prakticar 50/2.4. My model seems to be the older version (metal) - at least according to description on praktica-users
But the number of lens elements is different. Front group: three separated elements. Rear group: single element. That's 1-1-1|1 or 4/4 construction. Seems to be basic Ernostar.
Sample shot at f/2.4:
according to my opinion, sharpness is average, CA is low and bokeh is very good...
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