CRW is Canon's in-camera RAW
CRW is the raw sensor data a Canon camera writes at the moment of capture. It's produced by the camera's own hardware and firmware — software can read it, but nothing can manufacture a genuine CRW from a finished AI.
Looking to convert AI to CRW? Here's the honest answer — and what works instead.
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CRW is Canon's original raw format from early EOS and PowerShot cameras, storing unprocessed sensor data in a proprietary CIFF container before Canon switched to CR2.
CRW opens in Canon Digital Photo Professional, older Lightroom and Camera Raw; convert to DNG for long-term archiving.
No. CRW stores the raw signal a Canon sensor recorded at capture. A AI is a finished image with that data already baked in and discarded — there's nothing for a converter to reconstruct.
RAW formats like CRW give maximum editing latitude — but only when they come straight from the camera. Converting a AI to CRW would just wrap a finished image in a RAW container, with none of the benefits.
DNG is an open RAW container. You can convert a camera's own RAW (including CRW) into DNG, but you still can't turn a regular AI into CRW or any real RAW.
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