Can a DSLR capture CMYK images, or should you convert RGB to CMYK later?
Asked 3/23/2014
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Digital cameras record images using sensor color filters that are based on RGB-type capture, while many printing workflows use CMYK. If you plan to print photos, should you worry about quality loss when converting from RGB to CMYK? Can cameras like the Canon T3i or Nikon D3100 capture in CMYK mode, or is it better to convert the image in software before printing?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
12y ago
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Inherently, no. The RGB model is natural for recording light, and the CMYK model is natural for printing (where reflected light is subtracted). But see Are RGB numeric values equal to CMYK percentages? — the loss in conversation isn't inherently because RGB to CMYK is inherently lossy, but because the actual color spaces of the devices used are different, and converting in camera wouldn't do anything to help with that.
Some early digital cameras experimented with CMY filters (often CMYG). But these weren't actually producing CMYK output; it still went to RGB. The idea was basically that CMY primaries allow lighter, more transparent filters and therefore more sensitivity in low-light - but in practice, the conversion involves subtracting channels that don't share information, raising the noise and canceling out any advantage. Plus, there were apparently problems getting the filter dyes to align nicely. So, those have pretty much gone by the wayside.
Originally by user1943. Source · Licensed CC BY-SA 4.0
user1943
12y ago
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Generated from our catalog & community — verify before relying on it.
No—DSLRs like the Canon T3i and Nikon D3100 do not shoot CMYK. Camera sensors capture light in an additive way, which fits RGB-based recording. CMYK is a subtractive color model used mainly for certain printing processes, so it’s not a practical in-camera capture format.
Converting RGB to CMYK can involve some color changes, but the issue is usually not that RGB-to-CMYK conversion is inherently “bad.” The real limitation is that camera, screen, and printer color spaces do not perfectly match, so some colors may not reproduce exactly. In most normal photo printing, this is not a major problem.
Also, not all printers are strictly CMYK in the way people assume—many photo printers and photo-lab processes work from RGB data internally.
Best practice: shoot and edit in RGB, then convert only if your specific printer or print provider requires CMYK. If conversion is needed, doing it in software gives you more control than leaving it to an automatic printer conversion.
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