Re: Does MF color slides scanning in 24 bit still make sense
Re: Does MF color slides scanning in 24 bit still make sense
- Subject: Re: Does MF color slides scanning in 24 bit still make sense
- From: Mike Strickler <email@hidden>
- Date: Sat, 16 Jan 2016 20:36:41 -0800
I think one should be clear about the intended purpose of such DSLR captures. Expectations should probably be set at slide shows on computer displays and small prints--IOW good quality digital archiving. Sharp prints at 10X or greater enlargement may require higher spatial and tonal resolution (and lower flare) than these cameras can achieve. Best results with a camera will be had with a dedicated copying lens such as the Apo-Rodagon D and a slide copier. Enlarging lenses can also do a good job. Be mindful that the the focus error alone with mounted slides may seriously compromise results. A PMT drum scanner will, on the other hand, fix the entire film orignal at a precise distance from the lens, which is normally an apochromatic microscope objective, diffraction-limited at below f/1. 36 MP captured on such a device is a rather different thing from what you will get on a Nikon D800. A proper drum scan for a 10X enlargement of a medium format film will begin at 4,000 dpi, yielding over 60 MP, and will reveal the subtlest gradations and grain structure. A compromise between speed and quality might be found in a dedicated slide scanner such as the Nikon Coolscan. But even here wet mounting is recommended, and this again takes too much time for most people trying to record many images. My preference would be to drum scan any image to be critically printed and shoot the rest on a slide copier using a copy lens and decent DSLR.
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