image by Jörg Krüger (Image rights)
The C-900ZM is a 35mm compact camera manufactured by Panasonic.
It features a with 35 to 70mm f/3.5 to 6.7 zoom lens. This is not a powered zoom lens and requires twisting the barrel. The top shoulder to the body has a window that indicates the focal length. The lens is able to focus from 0.9m to inf. Three exposure modes are available, auto, daylight and no flash mode. There is a electronic self-timer with a delay of 10 seconds. It can be cancelled by using the timer button again. A LED blinks during the countdown, It is able to use DX Coded film from 50 to 1600 ISO (50, 100, 200, 400, 1000, 1600). Power is with a lithium CRP2 battery, a screw needs to be removed to access the battery chamber. The C-900ZM has a peculiar feature: if the flash is switched off and the light is low (less than 6 EV), the camera automatically changes into "bulb"-mode. That means the shutter remains open as long as the shutter button is pressed down. Values for 6 EV (ISO 100): 1/15 s at f/3.5 (35 mm) or 1/2 s at f/6.7 (70 mm). Another uncommon feature is the facility to store the exposure mode. After taking one picture in another mode but automatic the camera generally returns to automatic mode. You can change this behavior by pressing down the mode button for at least 5 s while selecting a new mode: the referring icon on the LC-display blinks and the new mode is stored until the mode button is pressed again or the camera is switched off.