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PEF at a glance
PEF
Pentax raw workflows never dominated the mass market, but their persistence in enthusiast and specialist photo libraries gives PEF ongoing practical relevance.
CRW at a glance
CRW
Early Canon digital-camera workflows used raw formats like CRW before the later EOS raw families stabilized around CR2 and then CR3.
Format comparison
| Feature | PEF | CRW |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 2006 | 2000 |
| Inventor | Pentax (now Ricoh) | Canon |
| Status | proprietary | proprietary |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Layer support | Not supported | Not supported |
| Vector scaling | Not supported | Not supported |
| Camera raw data | Supported | Supported |
| HDR support | Not supported | Not supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use PEF
- Your source file is already in PEF.
- Preserve source expectations before exporting to CRW.
- PEF is commonly used in image workflows.
When to use CRW
- Your target workflow expects CRW.
- Improve delivery compatibility with CRW.
- CRW is commonly used in image workflows.
FAQs
Why convert PEF to CRW?
Convert to CRW when maintaining compatibility with older Canon raw libraries or recovering historical camera originals.
In most current workflows it is a source to preserve or migrate, not a preferred new output format.
What changes when converting PEF to CRW?
This conversion changes how the format behaves in downstream tools and delivery environments.
What should I review after converting PEF to CRW?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.