In former articles I described various aspects of flatbed scanners. This article will address film scanners. I recommend the purchase of one of these if the user takes a lot of photographs, both slides and film, does mainly image editing, and is not interested in scanning paper based graphics.
Film scanners come in many sizes for use with various size film.
I will restrict this article to those that take only 35mm films. All the 35mm film scanners that I am aware of will scan black and white positive and negative film, color positive and negative film, and slides. The variations reflect bit depth, resolution, and speed. Film scanners come with film holders that will hold a negative strip and a have a place for the insertion of slides. As with flatbed scanners, the prescanning software package is important.