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Lightroom Classic’s New Ability to Use Embedded Previews

One of the new features in Lightroom Classic is that you can use the embedded previews more effectively to speed up importing and culling.

Categories: Importing into Lightroom
Tags: Lightroom Classic
Last updated about 4 months ago // Originally published about 5 months ago

One of the new features in Lightroom Classic is that you can use the embedded previews more effectively. Why would you want to do that? It can be vastly quicker for importing and culling photos because it dramatically cuts down on one of my least favorite things about working with Lightroom–slow imports.1

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Before this option was available, when you imported images into Lightroom you had the option of having Lightroom generate new previews or creating none.

The problem with creating new ones using the 1:1 or standard settings is that it’s a slow process, and you can end up waiting for quite a while before you could get on with culling (ie. choosing the keepers).

The problem with creating none (ie. the minimal setting) is that you need a preview for many basic tasks in Lightroom. It’s the whole point of a visual interface; otherwise you’d just be using filenames. If you choose the minimal setting when importing images into Lightroom, those previews aren’t there when you need them, so when you need a higher-resolution version to take a closer look, you have to wait for Lightroom to create a preview for that specific image. And, again, that’s slow.

But most cameras save an embedded JPG preview in the RAW files when it saves them to the memory card. Many cameras even make it a full-size image, not just a tiny thumbnail. It also reflects any filters or effects that you’re applying the camera, but those aren’t reflected in the underlying RAW file.

So now Lightroom can use those embedded previews that already exist. Because it cuts out the generating previews process, it can speed things up immensely. It’s one of the tricks that has been up the sleeves of PhotoMechanic for years that has give it such a strong reputation for speed.

Working with the Embedded Previews

You enable this feature in the import dialog. At the top right of the dialog, under File Handling, you have a menu for “Build Preview” options. The previous options of Minimal, Standard, and 1:1 are still there.

There’s also now a new option of Embedded & Sidecar.

Lightroom classic import embedded preview

Once the images are imported and you’re viewing them in the Library module, there’s a new small icon that shows that you’re looking at the embedded preview. It shows in the top left of the thumbnails, like this:

Lightroom classic import embedded preview icon

Replace Embedded Previews

To go along with this new option, there’s a second setting that comes in very handy. In Lightroom’s preferences, you can now choose “Replace embedded previews with standard previews during idle time.”

You can find this setting under Preferences > General > Import Options.

Lightroom classic embedded preview replace

Worth Knowing

This is only relevant if you’re working with RAW files.

Many newer cameras embed full-size previews, but not all do. Fujifilm and Olympus cameras use smaller embedded previews, but if you’ve enabled the RAW+JPG option when shooting with those cameras, this feature will use the JPG from those pairs (ie. the sidecar file).

It’s primarily useful for importing and culling images. Once you start editing the develop settings, Lightroom will need to generate its own preview to work with. But by that stage of the workflow, speed in working with large numbers of images should be less crucial and noticeable.

Conclusion

This is one of those features that I’m going to turn on by default. It addresses one of the biggest bottlenecks in the workflow–waiting for Lightroom to generate previews before getting to work–and is one of the reasons I often turned to PhotoMechanic for faster culling. Basically, it means you can get cracking on the culling process right away. Then, by the time you’re needing Lightroom to generate its own previews, you’ll hopefully be working with a much smaller collection of images and the previews were hopefully already generated while Lightroom was idle.

Extracting Preview JPGs from RAW Files

This is somewhat related, but if you’re looking to extract the embedded JPG previews from RAW images, there are apps that can do that.


  1. Technically, it defers the process by shifting the “building previews” process to later in the workflow and ideally to when the computer is idle. ↩

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David Coleman Photography

I’m a professional travel & location photographer based in Washington DC and traveling all over. Seven continents. Dozens of countries. Up mountains. Under water. And a bunch of places in between. You can find my main site at havecamerawilltravel.com. Or check out what’s in my go-to travel photography kit. Or get in touch here.

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