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eggboy
Joined: 20 May 2008
Posts: 190
Location: Western Massachusetts, USA
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 Posted: Wed Apr 20, 2011 4:46 pm Post subject: Carl Zeiss Biotar 12.5mm/f1.5 on the 'Bay |
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eggboy wrote:
Hi All,
Is this an 8mm Cine lens? I know nothing about cine lenses for the most part, but I wouldn't imagine a 16mm/C-mount Biotar would be 12.5mm focal length. I would assume it would be more like 25mm?
Click here to see on Ebay
_________________
Eugene
Current Fave Lenses:
Nikkor S.C 5cm/1.4 Rangefinder with Amadeo S>M Mount
Carl Zeiss Jena Sonnar 5cm/2 Contax RF c. 1937,
Nikkor-N 28/2 Nikon F mount
Digital Cameras:
Nikon Z 6II, Panasonic GX8
Film Cameras:
Ansco B2 6x9 Box Camera
Bronica S2
Nikon F2
List and a photo or two of my lens herd |
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Attila
Joined: 24 Feb 2007
Posts: 57865
Location: Hungary
Expire: 2025-11-18
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| Posted: Wed Apr 20, 2011 4:52 pm Post subject: |
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Attila wrote:
Practically no matter this is a 8 or 16mm lens in my opinion, 12mm focal length is too short to cover m4/3 sensor well... but wait a minute I saw some KODAK lens with D mount (8mm cine lens) which did cover APS-C  Sony NEX sensor when we did try it out , but it was longer focal length lens.
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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
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eggboy
Joined: 20 May 2008
Posts: 190
Location: Western Massachusetts, USA
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| Posted: Wed Apr 20, 2011 5:09 pm Post subject: |
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eggboy wrote:
So basically, who know, only way to find out is to try.
_________________
Eugene
Current Fave Lenses:
Nikkor S.C 5cm/1.4 Rangefinder with Amadeo S>M Mount
Carl Zeiss Jena Sonnar 5cm/2 Contax RF c. 1937,
Nikkor-N 28/2 Nikon F mount
Digital Cameras:
Nikon Z 6II, Panasonic GX8
Film Cameras:
Ansco B2 6x9 Box Camera
Bronica S2
Nikon F2
List and a photo or two of my lens herd |
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Attila
Joined: 24 Feb 2007
Posts: 57865
Location: Hungary
Expire: 2025-11-18
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| Posted: Wed Apr 20, 2011 5:22 pm Post subject: |
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Attila wrote:
| eggboy wrote: |
| So basically, who know, only way to find out is to try. |
yes, 90% for no sucess, 10% for a great deal.
_________________
-------------------------------
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
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calvin83
Joined: 12 Apr 2009
Posts: 7583
Location: Hong Kong
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| Posted: Wed Apr 20, 2011 5:23 pm Post subject: |
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calvin83 wrote:
Some 12.5mm lenses nearly cover the sensor of m4/3 such as the Yashica 12.5mm TV.
http://www.flickr.com/photos/astroman-photo/sets/72157622076204346/
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pat donnelly
Joined: 19 Jan 2010
Posts: 666
Location: Brisbane, Australia
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| Posted: Fri Apr 22, 2011 10:29 am Post subject: Hello Eugene! |
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pat donnelly wrote:
Looks too small of a mount to be c-mount, so I say D mount.
As Attila says, useless unless of longer f l, say 30mm or so for no vignetting. BUT, GH2 will accept smaller focal lengths in ECT mode. Good luck on buying a GH2, always out of stock at the moment!
Only way to attach a D-mount to a camera is to use the body cap! I am waiting for the clever artisans of China to machine a few hundred D-mount to m4/3 mounts for us ..... could be some time! Some Japanese hobbyists are adapting the d-mounts to point and shoot cams ...
So, I advise that you steer clear?
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EP-1, E-410, E-300, D100, D1,
C-Mt: 25mm 1.9, 75mm 1.4, 75mm 1.3, 75mm 1.9, Ultra wides, one inch sensor, 20+ c-mount zooms
OM 350mm f2.8, Nikkor 180 f2.8, Exa 180 f2.8,
Tamrons: 90mm f2.5, 500mm f8 x3, 135 f2.5, 200 f3.5, 24mm 2.5, 28mm 2.5 x8,
FD 500mm mirror lens |
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pat donnelly
Joined: 19 Jan 2010
Posts: 666
Location: Brisbane, Australia
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| Posted: Fri Apr 22, 2011 10:34 am Post subject: Hiya Calvin! |
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pat donnelly wrote:
G'day, mate!
http://www.flickr.com/photos/astroman-photo/3834437398/in/set-72157622076204346/
I think he cropped all the examples you saw? There is strong vignetting, quite attractive for many subjects, in this example and it is wide open, 1.5, out of a 1.3 lens.
Still desirable, but like nearly every wide lens I have tested so far, vignettes rule, OK? I may be wrong..... but it is dreadful physics at work!
_________________
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EP-1, E-410, E-300, D100, D1,
C-Mt: 25mm 1.9, 75mm 1.4, 75mm 1.3, 75mm 1.9, Ultra wides, one inch sensor, 20+ c-mount zooms
OM 350mm f2.8, Nikkor 180 f2.8, Exa 180 f2.8,
Tamrons: 90mm f2.5, 500mm f8 x3, 135 f2.5, 200 f3.5, 24mm 2.5, 28mm 2.5 x8,
FD 500mm mirror lens |
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