DIY, 8mm film scanner Kotokino Mark IV

The Kotokino Mark IV is an 8mm film scanner developed by Heikki Hietala, featuring significant modifications from previous versions. The design incorporates a single lens reflex (SLR) camera mounted above a horizontal film path, enhancing stability during operation. The scanner's box is constructed from durable floor laminate, with dimensions of 30 x 40 x 20 cm, allowing for adequate height to accommodate a lamp positioned away from the film to minimize grain. A Canon 1000D camera is utilized, equipped with a macro reverser ring for optimal image capture. The system captures images at a resolution of 3000 x 2100 pixels, which are later scaled down in editing.

The scanner operates using an Arduino, which controls servos for film transport and gate operation. The setup allows for 22 frames per minute, with a direct power supply to the camera to handle the extensive number of images per film roll. A 12V halogen lamp provides consistent lighting, and a film trough has been designed to accommodate splices in the film. The project has also influenced Hietala's teaching, leading to the introduction of courses focused on innovation and project work, where students apply their learning to real-life problems. The scanner is named Kotokino Mark IV in honor of Hietala's father, who documented family life through film, emphasizing the personal significance of the project.