Kodak Instamatic 100 was introduced in 1963 and discontinued in 1966. It uses type 126 film cartridges and is a square film format size 28 x 28 mm masked to 26½×26½mm for printing. The camera has a pop-up flash unit that uses push in single use AG-1 flash bulbs that operate from two AAA batteries and a synchronized shutter. The camera has a 43mm f/11 lens with a mechanical leaf shutter with speeds of 1/90 of a second and 1/40 of a second with the flash unit. The Instamatic 100 was designed like most of the line by Frank A. Zagara and it originally sold for about $100.00. Other features are the right thumb lever film advance, the back cover view window for frame count, optical viewfinder, and a handy carry strap.