FastRawViewer 1.6.1 Beta

This is a rolling update, Version 1.6.1 (Beta), adding the following:

Preliminary support for the following cameras:

  • Canon EOS R5, R6
  • Panasonic Lumix DC-G100/G110
  • Leica M10-R
  • Sony A7S-III

Support for lossy formats for previously-supported cameras:

  • Canon EOS-1D X Mark III
  • Fujifilm X-T4
FastRawViewer 1.6.1 beta


Color has been improved for the following Fujifilm cameras: X-T3, X-T30, X-T4, X-Pro3

New Settings

New Setting: File Formats - TIFF Support - Check if .TIF files are RAW.

The point of this is the following: some (old) cameras wrote RAW files with the .TIF extension. Accordingly, FastRawViewer checked each TIF file to see "is this a RAW file," which in some cases leads to false triggers.

  • This setting organizes the above-described checking procedure in the following way:
  • Do not check: consider .TIF files to be just TIF files, without suspecting them of being RAW
  • Known vendors: check the file to determine camera manufacturer, only trust a "this is RAW" verdict if the "vendor / number of colors in the file" combination fits known cases. This is the default, and it should work in 99% of cases
  • All TIFF files: same behavior as for FastRawViewer 1.5.0 - 1.6.0
FastRawViewer 1.6.1. File Format. TIF Support


  • Improved handling of corrupted or truncated CR3 files
  • For macOS 10.14/10.15, drag-and-drop did not work if several files were selected for the operation.
  • macOS: fixed copy operation for locked files.
  • macOS: fixed new programs found dialog colors in dark mode

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