released Ektachrome 100D in Super 8 and 16 mm formats. Super 8 film is available worldwide through specialty shops and online from major companies such as Amazon. It has become common to see it sold with processing prepaid and for it to be sold with scan-to-digital services at a variety of different levels from standard-definition digital to 4K data. It can even be purchased to include all the logistic associated with the process, including film processing, scanning and internet delivery of image and mail in and back services. This is a sample video done with the Super 8 film kit. Sound In the beginning of 1965, Super 8 was introduced as a silent format. Over time, several companies began to offer sync sound options for Super 8 filmmaking. Two companies introduced comprehensive sound systems for Super 8. These were Super8 Sound Inc. led by Harvard film professor Bob Doyle and Optasound led by Richard Leacock at MIT. With double system, as it was called, sound and picture are recorded separately. This was fine for more professional applications and for education about film production, but for consumers it was simply too complex and expensive. In 1973 Kodak introduced Ektasound—magnetic recording on the actual Super 8 film. The sound track was added on the edge of the film opposite to the perforations. Standard 8mm had the stripe between the perforations and the edge of the film which made good contact with a magnetic head problematic. A balance stripe was added on the opposite edge to facilitate spooling of the film. The Ektasound cartridge was deeper than the silent cartridge to allow access of the camera's recording head. Thus, silent cameras could not accept Ektasound cartridges, but Ektasound cameras and projectors accepted silent cartridges. Projectors, that could record and play sound, appeared before sound cameras. The sound was recorded 18 frames in advance of the picture (as opposed to 56 frames for standard 8mm). This short distance of just 3 inches facilitated the relatively compact size of the later sound cartridges. Some projectors used the balance stripe to provide a second channel for stereo sound. Super 8mm was also specified with an optical sound track. This occupied the same location as the magnetic track. Picture to sound separation in this format was 22 frames. Projectors and cameras obviously could not record sound in this system, but optical sound package movies became briefly popular,