FastRawViewer 1.5.1 Beta: Canon CR3 format support

Finally, the support for Canon CR3 format has entered open Beta!

Camera support

  • Canon: EOS R, EOS RP, EOS M50, PowerShot SX70 HS, EOS 250D (preliminary support)
  • Leica D-LUX7, Q2
  • Panasonic DC-G90/95

Kudos to Alexey Danilchenko for figuring out the CR3 format!

For Canon EOS R, we need 1.6x (APS-C crop) raw and craw samples, please e-mail us if you can help.

FastRawViewer 1.5.1 Beta

Minor changes

  • Prior to version 1.5.1, FastRawViewer always creates XMP sidecars with .xmp (lowercase) extension. File extension case (upper/lower/mixed) does not matter for most cases because widely used filesystems are not case sensitive. However, latest version of Windows 10 could support case sensitive filesystems (this should be enabled explicitly on per-folder basis), also Mac OS/macOS has case sensitive option.

    As a temporary solution FastRawViewer 1.5.1 implements limited additional case in-sensitivity for XMP sidecars:
    • if .xmp file is not present for given RAW file
    • but .XMP file is present (e.g. created by some other software)
    •  than .XMP one will be used for all operations with given file (metadata store, copy/move).

    If both files are present, the .xmp (lower case) one will be used. We are watching user feedback and possibly will make a more flexible / convenient solution (for example, explicitly specifying a register in the settings) in the future, if users will request it.

  • New setting: Thumbnail cache - Disk thumbmail cache - Use disk thumbnail cache for:TIFF and PNG files or All files.
  • removed misleading "(raw decode only)" comment for Sigma cameras in built-int supported camera list.
  • The Enable/DisableFoldersRefresh hidden setting is now visible as Preferences - Other - Refresh folders tree after file copy or move. To refresh subfolder list in Folders panel (if automatic refresh is off) use Refresh subfolder list item of right-click menu (right-click on folder name).

Bugs fixed

  • Fujifilm DBP for GX680: internal JPEG previes were displayed incorrectly

Download links

Beta versions history:

  • Build 1487: EOS 250D preliminary support
  • Build 1486: Preferences - Other - Refresh folders tree after file copy or move setting
  • Build 1485: Fixed DBP-680 issue, XMP case (in)sensitivity, Use disk thumbnail cache for setting,
  • Build 1483:Debug log file was not created on start (1.5.0 affected too)
  • Build 1482: fixed EOS R/APS-C crop issue
  • Build 1481: fixed wrong colors in some DNG files if color data was read from DNG tags
  • Build 1480: initial public release



When viewing internal JPG, the displayed image is incorrect.

Dear Sir:

Thank you, we will fix it.

Fixed in version 1.5.1-1485

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