G Series GD1 / GD2 Data Back

GD-1 Data Back: This data back with built-in quartz controlled LCD couples with the camera body to imprint date/time information on the film. The data back is simply exchanged with the standard camera back for installation.

GD-2 Data Back: A multi-function unit capable of recording data between frames. Data such as date, time, photo exposure data including exposure compensation, shutter speed, approximate aperture, and exposure mode. Or, data may be collected onto the first or first and second frames. The GD-2 also incorporates interval timing functions for nature and/or scientific photography.