Matching exposure across multiple photos

[heathclf]

I'd like to match exposure across a large set of photos, but for a specific part of the photo, not the entire photo. It would obviously be the same coordinates on each photo.

Any help is greatly appreciated.

Thanks!

[Abambo]

1. Put Auto Sync on [1]!
   
2. Select your pictures (you can also select first and put auto sync second).
3. Do whatever ("local" [2]) edits you want to do... each edit is synced automatically to all the pictures.
4. Put Auto Sync off.
5. You can continue editing each picture individually.

[heathclf]

Abambo,

Thank you for your quick reply. If I understand this correctly, it's in the right direction, but doesn't quite give me what I'm looking for.

1. How do I set exposure based only on part of the photo, instead of the entire thing? I'd like for each of the photos to be adjusted to a specific physical portion of itself (i.e. the top right corner), instead of the entire photo.
2. I'd like for each photo to be adjusted according to the automatic adjustments, individually, instead of applying the same auto-adjustments across the entire set. The light changes quite a bit over the series of time-lapse photos, and I'd like each photo to be considered individually.

Thanks!

[F. McLion · Accepted solution]

For time-lapse there's no integrated way to do this in LR.

I suggest to use a specific tool: https://lrtimelapse.com/

[johnrellis]

How do I set exposure based only on part of the photo, instead of the entire thing?

I don't think there is any way to do what you want.

The Match Total Exposure command (under Photo > Develop Settings) adjusts the Exposure slider so that the total effective exposure is the same for each photo.  The total effective exposure is the Exposure slider plus the camera exposure (shutter, aperture, ISO).  The camera exposure applies to the entire photo and isn't specific to any one part of the photo, so Match Total Exposure won't accomplish your goal.

One might think of cropping the photos to the desired area, then using Auto Tone to automatically adjust each, then removing the crops.  But unfortunately, Auto Tone always takes into consideration the entire photo, not the cropped portion.  So that won't work either.

[Abambo]

I suppose you are trying to square the circle.

The time-lapse tool as indicated by F. McLion may be the solution. Or you could also look into Adobe Video tools like Premiere Pro and After Effects.

[BardsEye]

This does not answer their question... this would adjust multiple images at the same time in the same way not adjust them to match each other or a reference image with the exposure desired. Match Total Exposures is what they are looking for... and that doesn't work at all for me for some unknown reason that no one is answering...