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Markus, this makes sense to me. I could not understand how mono camera users always seemed to give RGB filters the same exposure. My first job many years ago was in the printing industry as a Lithographic Camera Operator. This was in the days before digital reproduction had started so all printing plates were produced using photographic film.
My job was to colour separate an original piece of artwork into its primary colour components, ie RGB film separations. I always had to give the Blue filter maybe twice or more than the Red and Green filter exposures. In fact, each filter required its own different exposure.
I put the longer exposures necessary for the Blue filter down to its low transparency characteristics. If you hold a Red and Green filter up to your eye, you can easily see through them but the blue is much more opaque/darker and is difficult to see through.
Last edited by Mickoid; 26-10-2018 at 03:18 PM.
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