What is RAF?

RAF (Raw Image File) files contain unprocessed sensor data from Fujifilm X-Series (X-T5, X-Pro3, X100V) and GFX medium format cameras. They preserve the unique X-Trans color filter array data (non-Bayer pattern) and Film Simulation metadata (Provia, Velvia, Acros, etc.). RAF files store 14-bit color information with lossless compression, maintaining Fujifilm's renowned color science for post-processing.

RAF is used by photographers who value Fujifilm's JPEG-like colors and retro aesthetics for portrait photography, street photography, wedding work, and commercial assignments. The X-Trans sensor requires specialized demosaicing algorithms, making Fujifilm's RAW processing software optimal for RAF files. Popular among photographers transitioning from film due to Fujifilm's film simulation profiles. File sizes: 25-50 MB (APS-C), 100+ MB (GFX medium format).

Did you know? RAF files preserve Fujifilm's famous Film Simulation settings for post-processing!

History

Fujifilm introduced RAF format with their X-Series mirrorless cameras, emphasizing film heritage and distinctive color science in digital photography.

Key Milestones

  • 2011: X-Pro1 and RAF format launched
  • 2012: X-Trans sensor introduced
  • 2014: Expanded X-Series lineup
  • 2017: GFX medium format with RAF
  • 2020: Enhanced Film Simulations
  • Present: Standard for Fujifilm cameras

Key Features

Core Capabilities

  • 14-Bit Color: 16,384 levels per channel
  • X-Trans Data: Unique color filter array
  • Film Simulations: Provia, Velvia, Acros, etc.
  • Lossless Compression: Efficient storage
  • EXIF Rich: Complete shooting metadata
  • JPEG Preview: Film Sim preview

Common Use Cases

Portraits

Skin tone excellence

Street

Compact camera systems

Weddings

Beautiful colors OOC

Film Look

Analog aesthetics digital

Advantages

  • Excellent color science
  • Film Simulation metadata
  • Unique X-Trans sensor data
  • 14-bit color depth
  • Lossless compression
  • JPEG-like colors in RAW
  • Medium format options (GFX)

Disadvantages

  • X-Trans requires special processing
  • Best with Fujifilm software
  • Third-party support varies
  • Proprietary format
  • Large file sizes (especially GFX)
  • More processing power needed

Technical Information

Format Specifications

Specification Details
File Extension .raf
MIME Type image/x-fuji-raf
Color Depth 14-bit (16,384 levels per channel)
Sensor X-Trans (APS-C), Bayer (GFX)
Compression Lossless compressed
Typical Size 25-50 MB (X), 100+ MB (GFX)

Common Tools

  • Fujifilm: X RAW Studio, RAW File Converter EX
  • Adobe: Lightroom, Photoshop Camera Raw
  • Third-Party: Capture One, Iridient Developer
  • Converters: Adobe DNG Converter, RawTherapee