Automatic detection of active low light flash on this comprehensive model powered by lithium. The lens and viewfinder are covered by a sliding cover, which functions as a shutter closing. Name: Kodak Disc 4000 produced between: 1982 - 1984 Lens: 12.5mm, f / 2.8 Ashperic Shutter: 1/100, 1/200 type of film: HR Disc image size: 8 x 10 mm original list price (USD): 68.00