I own two Contax Cameras
139 and 159 MM
and four lenses:
Distagon 2,8/25 AE
Planar 1,4/50 AE
Sonnar 2,8/135 AE
Tele-Tessar 3,5/200 AE
Everything works fine except the aperture with the Contax Zeiss Distagon 2,8/25 AE.
On the lens I adjust 2,8 but the camera shows 1,4. Same is for other apertures: It is simply two apertures wrong.
· On both cameras same problem
· With all other lenses the aperture is exact
· What makes me crazy: the measuring seems to have not a big problem. If I compare Distagon 2,8/25 with other objectives and measure e.g. white wall or some other neutral object, I will get same value of exposure for the same aperture (I am reading the real aperture on the lenses) or in the worst case Distagon 2,8/25 will show half exposure longer needed.
I was thinking to disassemble the objective and move the hook to show exactly the right value on the cameras, but than, I will get the wrong value of exposure. I am totally confused! How can it be? What is wrong here? Is there any other measuring parameter I forgot?
Is it easy to move the hook/ring or do I need to put the lens all apart? From the back side, it looks to be reachable without big disassembling.
This problem occurred after my old RTS II broke down. This camera was anyhow showing wrong apertures on all objectives and I was compensating it with the ASA adjustment. Now, I bought a “new†159 which works fine and I first now noticed the problem.
Thanx for the help
Drazen (Klagenfurt, Austria)
139 and 159 MM
and four lenses:
Distagon 2,8/25 AE
Planar 1,4/50 AE
Sonnar 2,8/135 AE
Tele-Tessar 3,5/200 AE
Everything works fine except the aperture with the Contax Zeiss Distagon 2,8/25 AE.
On the lens I adjust 2,8 but the camera shows 1,4. Same is for other apertures: It is simply two apertures wrong.
· On both cameras same problem
· With all other lenses the aperture is exact
· What makes me crazy: the measuring seems to have not a big problem. If I compare Distagon 2,8/25 with other objectives and measure e.g. white wall or some other neutral object, I will get same value of exposure for the same aperture (I am reading the real aperture on the lenses) or in the worst case Distagon 2,8/25 will show half exposure longer needed.
I was thinking to disassemble the objective and move the hook to show exactly the right value on the cameras, but than, I will get the wrong value of exposure. I am totally confused! How can it be? What is wrong here? Is there any other measuring parameter I forgot?
Is it easy to move the hook/ring or do I need to put the lens all apart? From the back side, it looks to be reachable without big disassembling.
This problem occurred after my old RTS II broke down. This camera was anyhow showing wrong apertures on all objectives and I was compensating it with the ASA adjustment. Now, I bought a “new†159 which works fine and I first now noticed the problem.
Thanx for the help
Drazen (Klagenfurt, Austria)