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PEF at a glance
PEF
Pentax raw workflows never dominated the mass market, but their persistence in enthusiast and specialist photo libraries gives PEF ongoing practical relevance.
PNM at a glance
PNM
PBM, PGM, PPM, PNM, and later PAM come from the tool-centric tradition of keeping image interchange formats easy to parse, script, and transform.
Format comparison
| Feature | PEF | PNM |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 2006 | 1988 |
| Inventor | Pentax (now Ricoh) | Jef Poskanzer / Netpbm lineage |
| Status | proprietary | active |
| 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 | Supported | Not supported |
| HDR support | Not supported | Not supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use PEF
- Your source file is already in PEF.
- Preserve source expectations before exporting to PNM.
- PEF is commonly used in image workflows.
When to use PNM
- Your target workflow expects PNM.
- Improve delivery compatibility with PNM.
- PNM is commonly used in image workflows.
FAQs
Why convert PEF to PNM?
Convert to PNM when you need a plain, easily processed raster format for scripts, research, or utility pipelines.
It is useful as an intermediate representation in technical imaging workflows.
What changes when converting PEF to PNM?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to PNM removes camera raw data.
What should I review after converting PEF to PNM?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.