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CR2 at a glance
CR2
CR2 became the dominant Canon raw family through the long DSLR era, so huge real-world photo archives still depend on stable CR2 decoding and migration paths.
MEF at a glance
MEF
Digital photography fragmented into many manufacturer-specific raw formats because camera makers optimized for their own sensors, metadata, and software ecosystems rather than for one shared public raw standard.
Format comparison
| Feature | CR2 | MEF |
|---|---|---|
| File type | Not available | Not available |
| Extensions |
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| MIME type |
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| Compression / quality | Not available | Not available |
| File size characteristics | Not available | Not available |
| Compatibility | Not available | Not available |
| Editability | Not available | Not available |
| Created year | Not available | Not available |
| Inventor | Not available | Not available |
| Status | Not available | Not available |
| Transparency | Not available | Not available |
| Animation | Not available | Not available |
| Primary use cases |
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| Common software |
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| Archival suitability | Not available | Not available |
| Metadata handling | Not available | Not available |
| Delivery profile | Not available | Not available |
| Workflow fit | Not available | Not available |
| Layer support | Not available | Not available |
| Vector scaling | Not available | Not available |
| Camera raw data | Not available | Not available |
| HDR support | Not available | Not available |
| Streaming ready | Not available | Not available |
When to use each format
When to use CR2
- capture ingest
- editing
- web or print delivery
- Preserve capture-stage sensor information.
When to use MEF
- capture ingest
- editing
- web or print delivery
- Preserve capture-stage image data for later interpretation.
FAQs
Why convert CR2 to MEF?
Choose MEF as target when preserving Mamiya camera originals or maintaining compatibility with medium-format photographic workflows that still expect that raw format.
What changes when converting CR2 to MEF?
Convert to MEF when preserving Mamiya camera originals or maintaining compatibility with medium-format photographic workflows that still expect that raw format. It is appropriate for archive masters and non-destructive editing.
What should I review after converting CR2 to MEF?
After conversion, review these destination checks: Open converted output in LibRaw and verify behavior on real samples; Compare output against the expected raw quality profile; Many are vendor-specific and poorly documented publicly.
How can I keep quality stable in CR2 to MEF conversion?
Run representative samples, keep settings deterministic, and monitor these risks: Compatibility often depends on decoder support in tools such as LibRaw, Adobe Camera Raw, or vendor software; Many are vendor-specific and poorly documented publicly; Validate destination compatibility before large-batch conversion.