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Forum: Film Processing, Scanning, and Darkroom
04-07-2019, 03:51 PM
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I agree that a DSLR with the appropriate setup can make much faster scans particularly of slides and b&w. Of course this will require manual advancement and centering of the film. With color slides, post work of inversion is relatively trivial but of course there is no dust and scratch removal (ICE) and doing so manually can completely negate the speed advantage of this process.
Example of Nikon D800 "scan" of a very dirty Kodachrome compared to the Coolscan - with and without ICE. The Coolscan takes about a minute to complete a scan and I am certain it would take me much longer and even less quality to do the cleaning in post work.
In this example of a very dirty color negative film, you can see how good Coolscan ICE is as well as it's color accuracy compared to my attempt at color negative inversion in post work.
I've only attempted color negative inversion in post a few times although I have reviewed the process of many posted on youtube and two things are obvious. There is no one single process and any process will have to be adjusted for each frame of film. This alone - without consideration of dust and scratch removal, makes DSLR scanning of color negatives more time consuming then using a Coolscan.
The new Nikon D850 has color negative inversion built-in and I will have to try it out as I do have the autobellows for a full frame Nikon.
Speaking of the achieving the highest possible resolution from your scans, here is an example of scans from a Nikon D800, Coolscan and Pentax K20D of Kodak Techpan @ ISO25 processed in Technidol. You will notice that even though the D800 provides more pixels then a 4000dpi Coolscan, you will notice that they are about equal in achieving detail from the film. You will also notice that there is even more detail on the film that was not achieved by these methods.
I was just testing to see just how good my used manual focus lenses were and of course I was pleasantly surprised to find out just how outstanding a used Pentax-M 50mm F4 macro was!
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