Automatically adjusting exposure across a set of pictures, with linearly decreasing exposure

Question

I have the following problem: I am planning to create a time-lapse from a set of photos. However, the photos are taken during sunrise, and the brightness increases as the sun is rising, as my exposure was fixed during shooting. I would like to correct the exposure for the pictures, but basically I need to have them all consistently exposed.

Lets say the first picture starts with exposure '1', the last picture has exposure '0' and all pictures in between are adjusted linearly between 0 and 1 in order for a smooth reduction in brightness

I tried with the ‘auto’ correction in Lightroom, but there is too much variation across the pictures in the exposure after applying this setting.

So now, I would like to know if there is a way to create a 'script' or something to automate this

Conrad_C · Accepted Answer

If you need the exposure transition across frames to be made at the raw level for maximum image quality, Lightroom Classic doesn’t have any built-in tools for that, but there is other software that can help.

Jeffrey’s “Timelapse Support” Lightroom Plugin (donationware)

Timelapse+ STUDIO (commercial)

LRTimelapse (commercial)

I have only used the last one. It provides a very high level of control over the animation of many Develop module settings, but might be more than you need.

If the degree of adjustment needed isn’t too large, a basic way is to export the frames at a single middle exposure value, then use a video editing application such as Adobe Premiere Pro to convert the still frames to a single video and animate the exposure. But the quality won’t be as good.

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