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The goal of DNG was long-term archival and maximum compatibility; Nikon NEF, Canon CRW, and Sony ARW file formats are meant to capture the point-in-time exposur
by mikece 6y ago
The goal of DNG was long-term archival and maximum compatibility; Nikon NEF, Canon CRW, and Sony ARW file formats are meant to capture the point-in-time exposure information. Some of that point in time information involves the decisions the camera made about the exposure (Active D Light for Nikon... I'm sure Sony and Canon have their own settings they are saving) that matter for recording metadata about the image capture that go well beyond just the image itself for the purposes of long-term archival.
- sandofsky 6y agoThe purpose of DNG was to replace all those proprietary formats. It's stated in the introduction to the spec. If you want to store your proprietary "Active D Light," according to the spec: "DNG allows proprietary data to be stored using private tags, private IFDs and/or a private MakerNote."
- matwood 6y agoIt’s probably more of a legacy decision at this point, and photographers love their workflows almost as much as they love taking pictures. Also, the hardware in DSLRs is typically custom ASICS. Do you think there is a hardware limitation that prevents Nikon from outputting DNG at the same performance level as NEF?
- deleted 6y ago[deleted]