Electronic shutter, does not wear out like a mechanical one. In mass digitization it can no longer play a role
IR is not possible because the filter in front of the chip filters out invisible light
typical times 1/50 - 1/8, delays saving outside the camera
manual focus, focusing on grain and using a magnifying glass with the lens open
flatness of the original and chipmacro lens optimized for 1:1 magnification, sharpness and no distortion even in the corners
Aperture, increasing the depth of field to eliminate film unevenness but also worsening grain. Optimal aperture for the given lens (Rodagon F4, normally 1-2 apertures above the lens aperture)
minimum ISO to limit chip noise
compromise between effort and maximizing detail vs. file size. The resolution of the chip is greater than the resolution of the film and so no longer provides details. Also a question of speed, is it not better to digitize the archive not in the maximum possible quality and possibly digitize the exhibition pieces again with maximum "care"
The question of layer orientation:
the ideal photo layer for the lens so that the inhomogenity of the substrate is less reflected in the sharpness
The problem of color films
RGB scanning
LED CRI 95+
Old technologies used in color films
Autochrome:one of the first commercially successful methods for color photography and filmmaking in the early 20th century. Developed in 1903 by the Lumière company, the technology used glass plates coated with ground glass beads (granules) in the colors red, green, and blue (RGB), which acted as a filter to record a color image. Autochrome plates were popular until the 1930s, before being replaced by more advanced technologies such as Kodachrome and other color film processes.
Sublimazione Dufay (Dufaycolor): This method was developed by French engineer Georges Dufay in the 1930s. Its principle was to use a special film on which colored dots (tiny filters in RGB) were applied regularly in the form of a grid. This film was similar in nature to Autochrome, but with regularly arranged dots, which meant better control over the resulting colors. Dufaycolor was used for a period for color photography and filmmaking, but it never gained the popularity of other color film processes, such as Kodachrome, that appeared later.