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PTX at a glance
PTX
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.
SRF at a glance
SRF
Before ARW became the better-known Sony raw family, Sony's raw ecosystem already included older variants that modern tools still need to decode correctly.
Format comparison
| Feature | PTX | SRF |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 2005 | 2003 |
| Inventor | Pentax (now Ricoh) | Sony |
| 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 | Not 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 PTX
- Your source file is already in PTX.
- Preserve source expectations before exporting to SRF.
- PTX is commonly used in image workflows.
When to use SRF
- Your target workflow expects SRF.
- Improve delivery compatibility with SRF.
- SRF is commonly used in image workflows.
FAQs
Why convert PTX to SRF?
Convert to SRF when preserving older Sony originals or keeping a legacy Sony raw library intact.
It is useful for archive recovery and compatibility workflows.
What changes when converting PTX to SRF?
This conversion changes how the format behaves in downstream tools and delivery environments.
What should I review after converting PTX to SRF?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.