The postwar Contax IIa camera is a superb photographic tool which unfortunately has a certain number of typical weaknesses, some due to design mistakes, some due to a lack of use.
Please take note that the following list does not apply to the prewar Contax II camera which is a totally different camera not even sharing the least screw with its postwar successor.
Here is what you must check as soon as you receive your camera and before putting it at use :
- the RF image may be vertically out of alignment
- the shutter may stick at slow speeds (1/25 and below - 1/5s, 1/2s and 1s are often critical)
- the shutter may fade at high speeds (1/1250 and 1/500) and even travel closed at 1/1250
- the selftimer may run but be hesitant, or even stick
- using the selftimer may make the shutter fade or travel closed at 1/1250, 1/500 and even 1/250
- the shutter may stay open when you set the speeds selector on B, depress the shutter release button, and then remove your finger from it
- the shutter may sometimes not want to release at all especially if your camera is a "color dial" Contax IIa.
I highly recommend a complete overhaul if you plan to regularly use the camera, unless this has been done recently.
The lens should be okay provided that it's fungus and separation free and has no oil on the aperture blades. If the aperture ring is very hard to move, do not force it and have the Sonnar serviced as well.