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FB2 at a glance
FB2
FB2 became especially visible in Eastern European ebook ecosystems, where community standards and open library habits shaped ebook distribution differently from Kindle or EPUB-first markets.
SR2 at a glance
SR2
Early Sony raw formats reflect the transitional period in which Sony was still establishing its photography ecosystem and raw compatibility story.
Format comparison
| Feature | FB2 | SR2 |
|---|---|---|
| File type | Ebook | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 2004 | 2003 |
| Inventor | Russian eBook community | Sony |
| Status | active | proprietary |
| Primary use cases |
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When to use each format
When to use FB2
- Your source file is already in FB2.
- Preserve source expectations before exporting to SR2.
- FB2 is commonly used in ebook workflows.
When to use SR2
- Your target workflow expects SR2.
- Improve delivery compatibility with SR2.
- SR2 is commonly used in image workflows.
FAQs
Why convert FB2 to SR2?
Convert to SR2 when maintaining an archive of older Sony raws or preserving compatibility with an earlier Sony camera workflow.
In most modern pipelines it is a source or recovery target rather than a preferred new output.
What changes when converting FB2 to SR2?
This conversion changes how the format behaves in downstream tools and delivery environments.
What should I review after converting FB2 to SR2?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.