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What is ORF?

Olympus Raw Format (ORF) contains raw sensor data from Olympus OM-D, PEN, and other Olympus digital cameras.

What is PEF?

Pentax Electronic Format (PEF) contains raw sensor data from Pentax digital SLR and mirrorless cameras.

When Should You Use ORF vs PEF?

Use ORF When...

Reach for ORF when your priority is olympus camera raw processing — its uncompromising quality ensures every detail is preserved.

Use PEF When...

Reach for PEF when your priority is pentax camera post-processing — its uncompromising quality ensures every detail is preserved.

ORF vs PEF: Key Differences

  • •The core technical difference: ORF relies on lossless compression whereas PEF uses lossless compression.
  • •Neither format changes compression philosophy — both are lossless compression — so any size differences are due to encoding efficiency, not a shift in quality approach.
  • •How transparency is handled: PEF supports transparency, so alpha information is preserved during conversion.
  • •Storage footprint: 15-40MB per photo for ORF vs 15-45MB per photo for PEF.
  • •ORF is optimized for olympus camera raw processing while PEF is designed for pentax camera post-processing — choose based on your specific workflow needs

Advantages of ORF

  • ✓ORF applies lossless compression specifically calibrated for Olympus camera raw processing.
  • ✓ORF enjoys broad native support across operating systems, browsers, and creative tools alike.
  • ✓ORF guarantees every bit of the original data survives — no approximations, no shortcuts.
  • ✓You will find ORF support built into virtually every tool that handles Olympus camera raw processing — no plugins or converters needed.

Advantages of PEF

  • ✓PEF uses lossless compression tailored for Pentax camera post-processing.
  • ✓PEF is supported natively on virtually every device, browser, and operating system.
  • ✓PEF files are bit-for-bit perfect, preserving every pixel and sample for professional work.
  • ✓PEF integrates seamlessly with all major creative tools and workflows.

Common Use Cases for ORF to PEF Conversion

  • Mobile app UI assets
  • Product photography for marketplaces
  • Digital art portfolios
  • Brochure and flyer design
  • Newsletter graphics
  • Video thumbnail creation

Industry Applications

Brand ManagementContent ManagementMedical ImagingReal Estate PhotographyGame DevelopmentScientific Visualization

Best Practices for ORF to PEF Conversion

  • →When converting ORF to PEF, check whether PEF supports transparency — if not, your transparent areas will be filled with a solid color
  • →Use PEF for maximum quality archival and ORF for lossless workflows
  • →Optimize images for web to reduce page load times — tools like our converter let you adjust quality settings before conversion
  • →Maintain original aspect ratio to avoid distortion during conversion
  • →Always keep a backup of your original files before converting
  • →Choose the appropriate quality settings for your specific use case

Related Article

JPG vs PNG vs WebP: Which Image Format Should You Use?

Learn more about ORF and PEF formats in our detailed guide.

Troubleshooting ORF to PEF Conversion

  • !PEF shows visible compression artifacts → lower the compression level or switch to a lossless variant
  • !The converted PEF image looks washed out → the source ORF likely uses a wider color space than PEF supports
  • !PEF file is much larger than expected → check if the conversion preserved an unnecessarily high resolution
  • !Text in the converted PEF looks fuzzy → text-heavy images benefit from higher quality settings or a different output format

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Convert ORF to PEF Online - Free & Fast

Convert ORF files to PEF online for free. High-quality conversion with no registration required.

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About ORF and PEF

ORF

ORF (Olympus ORF raw) - Olympus Raw Format, raw image from Olympus cameras. Best for olympus camera raw processing.

PEF

PEF (Pentax PEF raw) - Pentax Electronic Format, raw format for Pentax cameras. Ideal for pentax camera post-processing.

Format Comparison

CompressionLossless → Lossless
TransparencySupported
Use CaseConvert from olympus camera raw processing to pentax camera post-processing
File Size~15-45MB per photo after conversion

FAQs

Is converting ORF to PEF free?

Yes, GoConvertFile offers free conversion of ORF to PEF for files up to 100MB. No registration required.

How long does it take to convert ORF to PEF?

Most ORF to PEF conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.

What is PEF best used for?

PEF is ideal for pentax camera post-processing. Pentax Electronic Format, raw format for Pentax cameras

What file size should I expect after converting ORF to PEF?

File size after ORF to PEF conversion depends on the content complexity and quality settings. Both formats use similar compression approaches so sizes are comparable.

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