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PNM Raw at a glance
PNM Raw
PNM survived because engineers kept needing a no-drama raster family for scripts, fixtures, codecs, and image-processing experiments where the format should not be the hard part.
CR3 at a glance
CR3
CR3 marks Canon's move into a newer raw-file generation as mirrorless and later-camera workflows evolved beyond the long CR2 era.
Format comparison
| Feature | PNM Raw | CR3 |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1988 | 2018 |
| Inventor | Jef Poskanzer | Canon |
| Status | active | 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 | Not supported | Supported |
| HDR support | Not supported | Not supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use PNM Raw
- Your source file is already in PNM Raw.
- Preserve source expectations before exporting to CR3.
- PNM Raw is commonly used in image workflows.
When to use CR3
- Your target workflow expects CR3.
- Improve delivery compatibility with CR3.
- CR3 is commonly used in image workflows.
FAQs
Why convert PNM Raw to CR3?
Convert to CR3 when preserving current Canon camera originals or exchanging material with workflows built around Canon's recent raw ecosystem.
It is appropriate for archive masters and non-destructive photographic editing.
What changes when converting PNM Raw to CR3?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to CR3 adds camera raw data.
What should I review after converting PNM Raw to CR3?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.