![]() Copying can be achieved with a macro lens on a camera, a dedicated slide/negative copier for a camera, or via a unit which is effectively a small captive camera. CopyingĬompared to scanning, copying is a relatively instantaneous process which involves projecting an entire image on an imaging sensor. ![]() They may also do an Infrared pass, which helps identify dust and scratches on the slide or negative. Scanners are usually lit from the front for reflective material (prints/documents), but transparent materials such as negatives or slides need to be lit from behind to give them adequate illumination.Īs it works one line at a time, scanning is relatively slow, but can give very high quality results: compared to a normal Bayer camera sensor there is no interpolation as scanners typically have a row of photosites for each colour, or alter the emitted light to get three separate samples. The row of photo sites move over, or relative to the target. Scanners work by sampling an image via a row of photo sites which read an image one ‘row’ at a time. ![]() This article seeks to inform about the basics of digitising of analogue film, it discusses the issues involved, different approaches available to do it for yourself, and some of the hardware and software available.
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