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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 FITS?

Flexible Image Transport System (FITS) is a scientific data format used primarily in astronomy for storing and transmitting images and datasets.

When Should You Use IIQ vs FITS?

Use IIQ When...

Reach for IIQ when your priority is professional studio photography, digital back capture — its uncompromising quality ensures every detail is preserved.

Use FITS When...

Reach for FITS when your priority is astronomy, scientific imaging, research — its uncompromising quality ensures every detail is preserved.

IIQ vs FITS: Key Differences

  • •IIQ uses lossless compression while FITS uses lossless compression — both take the same approach to file size management.
  • •Since both IIQ and FITS 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: FITS supports transparency, so alpha information is preserved during conversion.
  • •Storage footprint: 50-150MB per image from medium-format backs for IIQ vs Varies from 1MB to several GB for FITS.
  • •Primary audience: IIQ is built for professional studio photography, digital back capture scenarios, while FITS focuses on astronomy, scientific imaging, research — pick the format that matches your output requirement.

Advantages of IIQ

  • ✓IIQ compresses data using lossless methods, keeping file sizes manageable for Professional studio photography, digital back capture.
  • ✓Industry-wide support means IIQ files open anywhere — from legacy systems to the latest devices.
  • ✓Lossless quality makes IIQ the gold standard for archival and master copies.
  • ✓From Adobe Photoshop to open-source alternatives, IIQ works out of the box.

Advantages of FITS

  • ✓FITS compresses data using lossless methods, keeping file sizes manageable for Astronomy, scientific imaging, research.
  • ✓Industry-wide support means FITS files open anywhere — from legacy systems to the latest devices.
  • ✓Lossless quality makes FITS the gold standard for archival and master copies.
  • ✓From professional software to open-source alternatives, FITS works out of the box.

Common Use Cases for IIQ to FITS Conversion

  • Social media posts and ads
  • Digital photography and editing
  • Graphic design projects
  • E-commerce product images
  • Email marketing campaigns
  • Presentation graphics

Industry Applications

PhotographySocial Media MarketingPrint PublishingE-commerceDigital ArtUI/UX Design

Best Practices for IIQ to FITS Conversion

  • →When converting IIQ to FITS, check whether FITS supports transparency — if not, your transparent areas will be filled with a solid color
  • →Use FITS 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

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

Learn more about IIQ and FITS formats in our detailed guide.

Troubleshooting IIQ to FITS Conversion

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

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Convert IIQ to FITS Online - Free & Fast

Convert IIQ files to FITS online for free. High-quality conversion with no registration required.

Image Converter

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About IIQ and FITS

IIQ

IIQ (Phase One IIQ raw) - Phase One IIQ, raw format from Phase One medium-format cameras. Best for professional studio photography, digital back capture.

FITS

FITS (FITS data) - Flexible Image Transport System, scientific data format. Ideal for astronomy, scientific imaging, research.

Format Comparison

CompressionLossless → Lossless
TransparencySupported
Use CaseConvert from professional studio photography, digital back capture to astronomy, scientific imaging, research
File Size~Varies from 1MB to several GB after conversion

FAQs

Is converting IIQ to FITS free?

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

How long does it take to convert IIQ to FITS?

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

What is FITS best used for?

FITS is ideal for astronomy, scientific imaging, research. Flexible Image Transport System, scientific data format

What file size should I expect after converting IIQ to FITS?

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

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