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Contax Zeiss lenses on Sony Alpha 900

Gianluca Faletti , Dec 22, 2008; 11:27 a.m.

Good morning to all, in your opinion is possible mount (through an adaptor) the Contax Zeiss lenses on the new Sony Alpha 900 ?
Thank you to all.
Regards.

Responses

Peter Blaise Monahon , Dec 22, 2008; 12:14 p.m.

.

Contax-mount lenses? Do you mean Yashica or the universal screw mount or what type of "Contax" Zeiss lenses do you have?

I get my adapters from SRB Film, now at:

http://www.srb-griturn.com/

Tell us more, Gianluca, and let us know what you do.

PS - ALL Alpha's are the same lens mount.

.

Gianluca Faletti , Dec 22, 2008; 12:52 p.m.

Thank you very much for your kindness, I've sent an e-mail to them.
I have the Zeiss 80-200 mm f 4, the 28 mm f 2,8, the 50 mm f 1,7 all for Contax 159 MM and 167 MT.
If I'll buy the Alpha 900 I would like use these very good lenses.
Bye

Peter Blaise Monahon , Dec 22, 2008; 01:27 p.m.

.

Note that any non-electronic lens adapted to any modern electronic camera may have compromises:

(a) a teleconverter adapter which changes the optical qualities and effective focal length and effective aperture - some only require an adapter without a lens, but some require an adapter with a supplemental lens that acts as a teleconverter

(b) manual focus, manual zoom, manual stop down aperture for metering, note that focusing may be difficult at stopped down aperture, but focusing my be inacurate if not set while stopped down to taking aperture - modern auto focus viewfinders are hard to see through for manual focusing, also note that the Sony Alpha DSLR-A900 has the largest, clearest, 100% viewfinder and interchangeable focusing screens, so they saw you commin'! ;-)

(c) an inability to engage metering or automatic exposure features of the camera. The Sony Alpha DSLR-A900, I believe, can be used in Program or Aperture priority mode with non-electronic lenses and metering will work. The Sony Alpha DSLR-A200 can only be used in Manual mode with non-electronic lenses, so you must adjust aperture and shuttter speed, and metering may not be an accurate reference - does anyone have experience on the A200 with non-electronic lenses?

.

Godfrey DiGiorgi , Dec 23, 2008; 10:46 a.m.

Program mode with the A900 can't work with adapted lenses if the body cannot control the lens opening. Can it? For cameras that support metering with adapted lenses, usually Av and Manual metering work presuming some degrees of freedom about metering range and accuracy. I'm not familiar enough with the Sony bodies to answer for their specific capabilities.

Godfrey

Ilkka , Dec 23, 2008; 09:22 p.m.

"The Sony Alpha DSLR-A900, I believe, can be used in Program or Aperture priority mode with non-electronic lenses and metering will work."

In my experience, only manual metering works with non-electronic lenses in Sony A900. If someone has been able to make it work on Aperture priority auto, please let me know. There is no reason why A should not work, it does in older Minolta bodies and also in Olympus E system for example. But in my A900 I can only use these lenses on M. Not a big deal for me since the two lenses I use are both shift (one with tilt as well) and really need to be measured manually anyways.

Gianluca Faletti , Dec 24, 2008; 01:31 a.m.

Thank you very much to all.
Ilkka how is the Sony Alpha 900 images quality ?
Is superb or in your opinion is not exactly what is written in the web ?
I downloaded a real picture from the web, in my opinion there is some noise, also if it was taken in complete sun light, to low ISO.
Please tell me you opinion.
Thank you.

Gianluca Faletti , Dec 24, 2008; 09:41 a.m.

I've received the answer from the adaptor supplier, is not available the item from Contax Zeiss lenses to Alpha 900.
Bye

Brien M , Dec 24, 2008; 09:17 p.m.

I've only heard of the Contax Yashica lens adaptor for the Canon mount.

Ilkka , Dec 25, 2008; 02:38 a.m.

I don't have anything to complain about the A900 image quality. I have so far not used it on higher than ISO200 and I don't really need to. I have a tripod. I used to use Pentax 67 or a 6x12 panorama camera with Velvia or Provia. At ISO200 I have one stop more speed than I did before.
www.luminous-landscape.com has some good discussion on the supposed noise of this camera.

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