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What is RAW?

Camera RAW is a file format containing unprocessed sensor data captured directly from a digital camera sensor, providing maximum flexibility for professional photo editing.

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 RAW vs FITS?

Use RAW When...

Reach for RAW when your priority is professional photography, post-processing, editing — 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.

RAW vs FITS: Key Differences

  • •RAW uses lossless compression while FITS uses lossless compression — both take the same approach to file size management.
  • •Since both RAW and FITS use lossless compression, the quality characteristics are comparable — differences in file size come down to how efficiently each format implements compression.
  • •Alpha channel support: FITS lacks transparency support.
  • •Storage footprint: 20-50MB per photo depending on camera for RAW vs Varies from 1MB to several GB for FITS.
  • •Primary audience: RAW is built for professional photography, post-processing, editing scenarios, while FITS focuses on astronomy, scientific imaging, research — pick the format that matches your output requirement.

Advantages of RAW

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

Advantages of FITS

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

Common Use Cases for RAW to FITS 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 RAW to FITS Conversion

  • →When converting RAW 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 RAW 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 RAW and FITS formats in our detailed guide.

Troubleshooting RAW to FITS Conversion

  • !Converting RAW to FITS gives blurry output → increase the quality setting before conversion
  • !Colors look different in FITS than RAW → 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 RAW turned white in FITS → FITS may not support transparency

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Convert RAW to FITS Online - Free & Fast

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

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About RAW and FITS

RAW

RAW (Camera RAW images) - Camera RAW - uncompressed sensor data from digital cameras. Best for professional photography, post-processing, editing.

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 photography, post-processing, editing to astronomy, scientific imaging, research
File Size~Varies from 1MB to several GB after conversion

FAQs

Is converting RAW to FITS free?

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

How long does it take to convert RAW to FITS?

Most RAW 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 RAW to FITS?

File size after RAW 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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