Feature Request: Batch Exposure correction

Submitted by M.A. on Mon, 01/19/2026 - 12:30
Forums: 
General discussion

Please implement batch exposure correction. Current solution "apply to the next file" is very limiting and usable only in certain situations. 
 
thanks

LibRaw

Mon, 01/19/2026 - 18:02

Please try selecting the files (and filtering off from the view the files that are not selected using 'Sort/Filter files' panel) before using 'apply to the next file'.
Selecting/marking files: https://updates.fastrawviewer.com/data/FastRawViewer2-Manual-ENG.pdf#pag...
File Filtering: https://updates.fastrawviewer.com/data/FastRawViewer2-Manual-ENG.pdf#pag...

You can access the FastRawViewer manual via main Menu -> Help -> PDF Manual. The manual is a standard PDF file, with a table of contents; and the PDF itself is fully searchable.

M.A.

Tue, 01/20/2026 - 06:58

Hi thanks for such quick reply,
to clear up the terminology i was referring to exposure correction "Keep from prev file" setting,  but find it very cumbersome and while i attempted using it few times throughout the years i always give up. It assumes fully sequential curling and one of the biggest problems is exactly that that is keeps from a previous file, even if a folder is switched and can mess up exposure on files which dont need it.
 
to clear up my request, basically i am asking if exposure (and while we are at it WB) settings in "Adjust" tab and hot keys especialy, and the bottom bar can be enabled to modify exposure on multiple files at once. Currently they are only enabled if a file is open and grayed out in image grid and filmstrip for multiple files. 
 
As these adjustments (exposure and wb) are also just writen to xmp files like as for rotation setting (which is enabled and functions in all views for single and multiple files) it doesn't seem like it should be hard to enable. 
 
I initially wrote implement which also seems incorrect as it seems more of a "enable" the functionality for multiple files as it already exists for other settings. Rating, notes, categories, rotation ... all are just writen to XMPs and can be done to multiple files at once and Exposure and WB which also are just writen to XMPs cant for multiple files.
 
thanks, I hope i didn't convolute this too much :)

LibRaw

Wed, 01/21/2026 - 08:30

Please try what we've suggested. When the files are selected, and visibility is set to 'selected', changing folder doesn't lead to a mess. Propagation allows for fine-tuning of each "exposure" (and other parameter, labels, ratings, rejections, etc. if needed) . Using selections makes culling process targeted rather than sequential.

Rotation is compensating for lack of orientation data or malfunctions of orientation sensor in the camera, that is for something very regular. "Exposure" is a parameter of a different nature, and a blind "exposure" tuning often leads to two sequential culling passes. To add, if applying "auto exposure" to a batch all raw data from all the files in a batch need to be analyzed prior to the action.

M.A.

Wed, 01/21/2026 - 11:02

Hi,
I have been using FRV for almost 10 years, I am pretty familiar with it. I think there is a misunderstanding regarding what I am asking for, specifically regarding your comment about "Auto Exposure."
I am not asking for "Auto Exposure"
You mentioned that "applying auto exposure to a batch requires analyzing raw data."  That is not what I am asking for.
I am asking for a Exposure Correction adjustment for selected files(e.g., "Write Small Step EV to these 10 XMP files").
It is technically identical to writing a Rotation, Rating or Label to a batch of XMPs. It is just a text value write operation.

I followed your instructions to use the Filter method, I am totally missing something or cant get it to work

  • Scenario A (Multi-Select): If I select multiple files in the browser, the Adjust Exposure Correction controls become grayed out/unclickable and Hotkeys don't work.
  • Scenario B if I filter the same selection (as you are recommending) I can modify Exposure but it only applies to single selected or opened file, not to all in the filtered view. So it doesn't really help i can do the same without any filters when a file is open, still would have to change on each individual file.
  • Scenario C (Filter & Keep Prev.): If I filter the selected files and turn on "Keep from Prev. File," I still have to linearly open every single file for the setting to stick. I cannot just apply it and move on. And it applies the EC to next file after the filter has been removed and files unselected
  • Scenario D : To stop this setting from applying to next file I open, I only solution i can think of would be:
    1. Open Prefs -> Enable "Keep from Prev".
    2. Make a Selection, Filter & Set EC and linearly go through the selection.
    3. Open Prefs -> Disable "Keep from Prev".
    4. Unfilter and resume culling.

This scenario D is far too convoluted and complex and i'm pretty sure that is not what your are suggestions, but nothing else works.
I'm asking if you can Please simply enable the Exposure Adjustment controls and hotkeys when multiple files are selected (currently grayed out and hotkeys don't work). So If 10 files are selected and EC modified that value is written to the 10 XMP files, exactly like you already do for Rotation, Ratings...etc
thanks

 

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