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What is FITS?

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

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.

When Should You Use FITS vs IIQ?

Use FITS When...

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

Use IIQ When...

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

FITS vs IIQ: Key Differences

  • •FITS uses lossless compression while IIQ uses lossless compression — both take the same approach to file size management.
  • •Since both FITS and IIQ use lossless compression, the quality characteristics are comparable — differences in file size come down to how efficiently each format implements compression.
  • •Transparency: N/A
  • •Storage footprint: Varies from 1MB to several GB for FITS vs 50-150MB per image from medium-format backs for IIQ.
  • •FITS is optimized for astronomy, scientific imaging, research while IIQ is designed for professional studio photography, digital back capture — choose based on your specific workflow needs

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.

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.

Common Use Cases for FITS to IIQ Conversion

  • Product photography for marketplaces
  • Digital art portfolios
  • Brochure and flyer design
  • Newsletter graphics
  • Video thumbnail creation
  • Certificate and badge design

Industry Applications

Content ManagementMedical ImagingReal Estate PhotographyGame DevelopmentScientific VisualizationE-learning Content

Best Practices for FITS to IIQ Conversion

  • →When converting FITS to IIQ, check whether IIQ supports transparency — if not, your transparent areas will be filled with a solid color
  • →Use IIQ for maximum quality archival and FITS 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 FITS and IIQ formats in our detailed guide.

Troubleshooting FITS to IIQ Conversion

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

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Convert FITS to IIQ Online - Free & Fast

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

Image Converter

Upload or enter a URL to convert FITS to IIQ instantly

Click to upload or drag & drop FITS file

or paste from clipboard

.fits,.FITS (max 100MB)

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About FITS and IIQ

FITS

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

IIQ

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

Format Comparison

CompressionLossless → Lossless
TransparencySupported
Use CaseConvert from astronomy, scientific imaging, research to professional studio photography, digital back capture
File Size~50-150MB per image from medium-format backs after conversion

FAQs

Is converting FITS to IIQ free?

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

How long does it take to convert FITS to IIQ?

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

What is IIQ best used for?

IIQ is ideal for professional studio photography, digital back capture. Phase One IIQ, raw format from Phase One medium-format cameras

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

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

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