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WMF at a glance
WMF
The original WMF specification was published in the Windows 3.1 SDK documentation in 1992. Aldus Corporation independently added a 'placeable' header for device independence, which Microsoft later incorporated in Windows 2000. The format specification was republished in 2006 under the Microsoft Open Specification Promise.
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 | WMF | CR3 |
|---|---|---|
| File type | Vector | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1990 | 2018 |
| Inventor | Microsoft Corporation | Canon |
| Status | legacy | proprietary |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Layer support | Not supported | Not supported |
| Vector scaling | Supported | Not supported |
When to use each format
When to use WMF
- Your source file is already in WMF.
- Preserve source expectations before exporting to CR3.
- WMF is commonly used in vector 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 WMF 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 WMF to CR3?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to CR3 removes vector scaling.
What should I review after converting WMF to CR3?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.