Competitive Polaroid, Microtek and Minolta medium-format scanners were about as good, but scarcer than hens teeth nowadays. You're talking minimum $1299 for a Nikon CS8000, double that for the similar 9000. Jroos, it is not worth the expense of buying the medium-format equivalent of your Nikon film scanner for just 14 frames. Just as an image looks 'too dark' if your display brightness is way, way too low. The 'dark' appearing image isn't too dark in reality, it's dark when it isn't properly previewed. The RGB values of every pixel above in both examples is identical. Open and Assign a gamma corrected profile (say sRGB), it looks dark:īoth this capture (TIFF) and Profile are here:ĭropbox - Kodak Linear image and profile - Simplify your life Here's a linear capture from an old Kodak DCS 660 camera and it's ICC profile. Easy for anyone to see here if they wish. A linear encoded image assumed to be gamma corrected would look too dark. No, it's not normal per se, only when color management isn't provided only normal without proper color management! A profile that defines a linear capture absolutely shouldn't (and doesn't ) look too dark. I've never worked with scanners that are commonly used by photo service shops (for example a Noritsu), but asking the shop for 16bit depth gamma 1 tiffs with no conversion to positive and no 'corrections', what they would produce is what Ed Hamrick calls a raw file. I know what you're saying and don't disagree. My scanner hardware is a Nikon V which is 14 bit, its maximum bit depth. And if they can't, find another provider.Īccording to the User Guide "The image gamma value is 1.0 when there are two bytes (16-bits) per sample.Raw files saved with gamma 1.0 will look dark, but this is normal." I know what you're saying Don, but it's all purely academic without knowing the specifics of the scanner hardware and film type.Īgreed. Plus Vuescan will look at the white and black-point 'densities' of any file thrown at it, before aligning, normalising and adjusting the channel levels. Albeit wrapped up in a 16 bit/channel file. If the scanner only has a 10 or 12 bit A/D converter, then that'll be the maximum bit depth. Negative film has a contrast index of between 0.5 and 0.7, while slide film's 'gamma' is much higher.Īlso, the bit depth depends on the scanner hardware. Except gamma 1 is meaningless when applied to a digital copy from film.
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