The Kodak Advantix 3100AF is a camera for the APS film format. It features autofocus, a tripod socket, and a self-timer. It was made in Mexico and introduced in 1997. This camera uses a 3-volt lithium KODAK KCR 2 (or equivalent) battery that supplies power for all camera operations. The camera automatically turns off after 4 minutes. The battery symbol is always present when the camera is turned on and when it "blinks," you will need to replace the battery soon. When the battery symbol is solid (non-blinking) and the shutter button does not operate, replace the battery immediately. You can take Classic (C), HDTV (H), and Panoramic (P) pictures on the same film cassette and the viewfinder adjusted depending on the setting. The camera uses KODAK ADVANTIX Film and the film-speed Range was DXIX (ISO) 100, 200, 400, and 800 for color prints. The lens is a 25 mm, f /4.6 Kodak Ektanar and the camera had active autofocus with zone crossover at 5 feet (1.5 m). The programmed electronic shutter has speeds of 1/100 to 1/160 of a second. The dimensions are approximately 1.5 x 2.5 x 4.7 in (38 x 63 x 119 mm) and its weight is approximately 7 ounces (195 g) with battery and film. The camera also has Red-Eye-Reduction, a Self-Timer, Off-Flash setting, Mode Button, Rewind Button, optical viewfinder, flash-warning/Self-Timer lamp, a ¼” 20 thread tripod socket, ½” x 5/16” LCD screen (12.7 x 7.94mm), frame counter, and a film-present indicator.