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ERF at a glance
ERF
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.
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.
Format comparison
| Feature | ERF | CR2 |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 2004 | 2004 |
| Inventor | Epson | 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 | 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 ERF
- Your source file is already in ERF.
- Preserve source expectations before exporting to CR2.
- ERF is commonly used in image workflows.
When to use CR2
- Your target workflow expects CR2.
- Improve delivery compatibility with CR2.
- CR2 is commonly used in image workflows.
FAQs
Why convert ERF to CR2?
Convert to CR2 when preserving Canon originals or maintaining a workflow that expects Canon raw files.
It is useful for archive retention, raw editing, and non-destructive photo finishing.
What changes when converting ERF to CR2?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to CR2 adds vector scaling.
What should I review after converting ERF to CR2?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.