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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.
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 | PNM Raw | SR2 |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1988 | 2003 |
| Inventor | Jef Poskanzer | Sony |
| 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 SR2.
- PNM Raw is commonly used in image 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 PNM Raw 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 PNM Raw to SR2?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to SR2 adds camera raw data.
What should I review after converting PNM Raw to SR2?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.