What is ORF?

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

What is ARW?

Sony Alpha Raw (ARW) is Sony's proprietary raw image format containing unprocessed sensor data from Sony Alpha and Cyber-shot cameras.

When Should You Use ORF vs ARW?

ORF vs ARW: Key Differences

• •ORF uses lossless compression while ARW uses lossless compression — both take the same approach to file size management.
• •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: ARW supports transparency, so alpha information is preserved during conversion.
• •ORF files are typically 15-40MB per photo while ARW files range 20-40MB per photo
• •ORF is optimized for olympus camera raw processing while ARW is designed for sony camera post-processing, professional editing — choose based on your specific workflow needs

Advantages of ORF

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

Advantages of ARW

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

Common Use Cases for ORF to ARW Conversion

• Graphic design projects
• E-commerce product images
• Email marketing campaigns
• Presentation graphics
• Blog and article illustrations
• Mobile app UI assets

Industry Applications

Best Practices for ORF to ARW Conversion

• →Before converting ORF to ARW, decide whether you need maximum quality or smallest file size — this determines which format truly fits
• →Save a master copy in a lossless format before converting to ARW — you cannot recover detail lost during lossy compression
• →Check the color profile: ORF images may use a wider gamut than ARW supports, causing a visible shift after conversion
• →Resize images to the final display dimensions before converting — this avoids unnecessary processing of oversized files
• →Run a single test conversion first to verify quality meets your standards
• →Strip unnecessary metadata to reduce file size after conversion

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Troubleshooting ORF to ARW Conversion

• !Converting ORF to ARW gives blurry output → increase the quality setting before conversion
• !Colors look different in ARW than ORF → check color profile mismatch (sRGB vs Adobe RGB)
• !File size changed more than expected → ARW uses different compression, file size differences of 2-5x are normal
• !Transparent areas in ORF turned white in ARW → ARW may not support transparency

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