What is IIQ?

Phase One IIQ is a professional medium-format raw format used by Phase One digital backs, delivering exceptional image quality for commercial photography.

What is EXR?

OpenEXR is a high-dynamic-range raster image format developed by Industrial Light & Magic for the VFX and film industry.

When Should You Use IIQ vs EXR?

IIQ vs EXR: Key Differences

• •IIQ and EXR diverge on compression: lossless compression for the source, lossless compression for the target.
• •Since both IIQ and EXR use lossless compression, the quality characteristics are comparable — differences in file size come down to how efficiently each format implements compression.
• •How transparency is handled: EXR supports transparency, so alpha information is preserved during conversion.
• •IIQ files are typically 50-150MB per image from medium-format backs while EXR files range 15-100MB for high-res HDR frames
• •Use case fit: IIQ targets professional studio photography, digital back capture and EXR targets vfx, 3d rendering, hdr imaging — your choice depends on which workflow stage you are serving.

Advantages of IIQ

• ✓At its core, IIQ relies on lossless encoding — a design choice that makes it perfect for Professional studio photography, digital back capture.
• ✓You won't run into compatibility issues with IIQ — it's a universal standard across platforms.
• ✓File size management with IIQ: larger files guaranteed to match the original exactly.
• ✓Every major application in the Professional studio photography, digital back capture space supports IIQ natively.

Advantages of EXR

• ✓EXR uses lossless compression tailored for VFX, 3D rendering, HDR imaging.
• ✓EXR is supported natively on virtually every device, browser, and operating system.
• ✓EXR files are bit-for-bit perfect, preserving every pixel and sample for professional work.
• ✓EXR integrates seamlessly with all major creative tools and workflows.

Common Use Cases for IIQ to EXR Conversion

• Newsletter graphics
• Video thumbnail creation
• Certificate and badge design
• Websites and online content
• Print materials and publications
• Social media posts and ads

Industry Applications

Best Practices for IIQ to EXR Conversion

• →When converting IIQ to EXR, check whether EXR supports transparency — if not, your transparent areas will be filled with a solid color
• →Use EXR for maximum quality archival and IIQ 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

Troubleshooting IIQ to EXR Conversion

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

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