Lightroom Dual ISO Plugin

This plugin allows you to convert Dual ISO picture from Lightroom directly to cr2hdr tools.

Lightroom v6 (not tested with earlier versions) and more is needed.

Dual ISO Plugin

How to use:

  • Default settings

    • Right click on one or multiple selected pictures
      • Select : Dual ISO Converter (cr2hdr) (this option uses default settings, see below)
  • Custom settings

    • Launch the Export Window
      • Right click on one or multiple selected pictures
        • Export selected photo(s)
      • Shortcuts
        • Windows: Ctrl + Shift + E / Mac: Command + Shift + E
    • Change what you want

Default settings:

> Plugin settings:

  • Add suffix -dualiso to the output file
  • No subfolder
  • Show summary message
  • Keep log file
  • Keep DNG file after conversion
  • No keywords added by user (Dual-ISO is added by cr2hdr)
  • No label defined
  • Synchronize keywords with original picture
  • Synchronize development settings from original
  • Reject original picture (flag unmarked)
  • Add converted file to all collections of the original

> cr2hdr settings:

  • --amaze
  • --cs2x2
  • --no-bad-pix
  • --fullres
  • --alias-map
  • --stripe-fix
  • --no-compress
  • --wb=graymax

This plugin is translate in english, french, german, portuguese and swedish. (feel free to send me a translated file).

/!\ BETA /!\ Download the lastest version of Lightroom Dual ISO Converter (cr2hdr) plugin (v3.0 BETA1).

How the plugin works:

  • Pictures selected to export are listed
  • Only CR2 and DNG files are supported (if file is not present, skip)
  • Each picture, one by one is converted with cr2hdr (with defaults or custom args)
    • if cr2hdr --same-levels are selected, all pictures are converted in the same time
  • Picture is moved to subfolder
  • Picture is renamed with suffix
  • Picture is imported into Lightroom catalog
  • Label is added
  • Keywords are added (and created if needed)
  • Synchronize keywords with original file
  • Synchronize development settings with original file
  • Keyword Dual ISO raw or no Dual ISO is added to original file
  • Parse log file to fill metadata with cr2hdr results
  • Add picture to all collections
  • Keep or remove log file
  • Set the flag of the original file

How to install this plugin:

To install this plugin, save the file cr2hdr.lrplugin where you want.

On Lightroom, open the Plug-In Manager (shortcut Win: Ctrl + Alt + Shift + , (comma), Mac: Command + Option + Shift + , (comma)) and install it.

You can follow instructions from Adobe.

Follow the projet on Magic Lantern Forum.

Contribute to the code on Bitbucket.

This plugin is distributed under the GNU GPL v2.


  • The developers of Magic Lantern for their great work and support
  • Adobe for their great soft like Adobe Photoshop Lightroom
  • Dave Coffin for dcraw
  • Phil Harvey for exiftool
  • a1ex for Dual ISO module and cr2hdr executable
  • Contributors of this plugin:
    • Metadata support by akry
    • GUI enhancement by dfort
    • Translations:
      • English by Audionut and Walter Schulz
      • German by g3gg0 and Walter Schulz
      • Portuguese by Luiz Roberto dos Santos
      • Swedish by Danne
    • Testers:
      • Audionut, chris_overseas, Danne, DeafEyeJedi, dmilligan, fotogemeinschaft_de, g3gg0, garry23, Levas, Luiz Roberto dos Santos, Marsu42, rpt, Stedda, swinxx, vertigopix, Walter Schulz & al.


2015-10-18 v3.0-BETA3.3

  • Mac now uses dcraw and exiftool that are packaged inside the plugin. Thanks Daniel Fort
  • Fix bug with Mac OS X El Capitain (10.11) Thanks Daniel Fort
  • Fix Mac GUI bug with radio fields. Thanks Daniel Fort

2014-09-30 v3.0 BETA 3

  • fix bug with cr2hdr command on windows

2014-09-22 v3.0 BETA 2

  • fix bug with subfolder
  • fix bug with same-levels

2014-09-13 v3.0 BETA

  • Rewrite processing (no unnecessary export)
  • Update cr2hdr 20bit to 0eabcb0
  • cr2hdr 20bit --same-levels argument supported
  • Added keywords Dual ISO raw or no Dual ISO to original file (speedup process and sorting in LR)
  • Synchronize keywords with original file
  • Convert tabs with 4 space
  • fix some bugs
  • (change editor text: Brackets before Smultron/TextMate)
  • (change Mercurial CLI to GUI: TortoiseHG for Mac)

2014-04-21 - 2014-09-12 v2.2 BETA

  • Added cr2hdr args
  • Added cr2hdr 20bit support
  • Added metadata with cr2hdr results (big thanks akry)
  • Added keywords
  • Added color label
  • Added flag rejection
  • Restore default plugin settings

2014-03-27 v2.1

  • Export to subfolder
  • redesign ui

2014-03-26 v2.0.2

  • Correct portuguese translation (thanks Luiz)

2014-03-26 v2.0.1

  • Remove extern functions
  • Works on Windows

2014-03-25 v2.0

  • New export window
  • DNG file supported
  • Custom user settings (suffix, label, add to collection, remove logfile)
  • Mac: check dependencies

2014-03-19 v1.0.3

  • Fix multiple instance of cr2hdr (thanks Rob Cole from Adobe forums)

2014-03-19 v1.0.2

  • Add portuguese translation (thanks Luiz Roberto dos Santos)
  • Change output name (solve fotogemeinschaft*de problem with export name)

2014-03-19 v1.0.1

  • Add german translation (thanks g3gg0 et Walter)
  • Update dcraw (9.20) and exiftool (9.54)
  • Windows command run without CMD visible (thanks chris*overseas)

2014-03-18 v1.0

  • First release (Mac fully compatible, Windows need some optimisation)