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Home » Lightroom Local Adjustments for Midtone Control

Lightroom Local Adjustments for Midtone Control

September 4, 2021 by A. Cemal Ekin
Global Adjustments OnlyRadial filter with luminace mask

In most images, midtones carry much of the important information. This is not true for all images, but those are the exceptions. In this post, I will present an approach to us Lightroom local adjustments to control midtone information from color to tonal structure. Compare the two images below by moving the slider right and left.

Start With Global Adjustments

This is true in Photoshop as well as in Lightroom that we start by making the global adjustments then move to control various parts of the image. Photoshop offers far more flexible and nuanced tools for all these adjustments, but Lightroom now has a few tools under its belt. Depending on the need, we can use the graduated filter, the radial filter, or the brush tool for local adjustments. I would like to focus specifically on the range tool that can be controlled by color or luminance when using any of the local adjustments.

Add a Lightroom Local Adjustments Radial Filter

This tool allows us to draw an ellipse around the area we want to adjust or exclude from the adjustments. In other words, the adjustments can be applied to what is inside the selection ellipse or outside. In this post, I will use it to limit the adjustments to the inside area of the radial filter.

The rose in the image with only global adjustments has something akin to the magenta bloom that plagued the earlier digital cameras. With the global adjustments, I brought it to this point. If I lower the Exposure, Highlight, or Whites sliders the entire image will be affected. To limit the adjustments to where the rose is, I start by drawing a Lightroom local adjustment radial filter tool. The impacted area gradually tapers off from the center toward the edge of the filter area. That fade is controlled by the “Feather” slider of the tool.

Global Adjustments Only
Lightroom local adjustments Radial Filter Outline

Restrict With Luminance Range Mask

To restrict the adjustments to the midtones while leaving the highlights and deep shadows, I turned on the range mask by selecting the “Luminance” option. I will show how the other, color option works in a bit too. Look for the luminance range with upper and lower ends movable. Currently, they are at 100 and 0. Dragging the upper edge towards the left protects the highlights above the selected point and, dragging the lower edge to the right protects the shadows and blacks below it. As we make various adjustments, both endpoints are still under our control, and we can even slide the range up and down by picking it from in between and sliding the scale.

The adjustments to reduce the excessive glow and color are by using the necessary sliders on the radial filter tool. You can see all the adjustments on the image in the screen capture of the tool panel. Just to show the extent of the adjustments, I exported the image while the local adjustments graduated filter was active, but the range mask was turned off. You can see the control luminance range mask applies to the adjustments to produce the desired results.

Global Adjustments Only
Radial filter with luminace mask
Radial Filter with Luminance Mask Turned Off
Adjustments applied with luminace range mask

Restrict With Color Range Mask

Although not specifically the midtones, the same tool can be used by applying a color range mask. Simply select “Color” from the range mask options, then select the range of colors to include by either drawing a rectangle with the eyedropper or by shift-clicking on various color areas. For this post, I drew a rectangle to include a range of colors from highlights to shadows on the rose. After that, I applied the needed adjustments to tame the same issues as above. This time, I ended up using different sliders because the area of influence was controlled by the color range rather than the luminosity range. The result is similar but not identical to the first option. That is partly due to color-based selection rather than midtones.

Global Adjustments Only
Adjustments with radial filter, color range mask for flower
Adjustments with radial filter, color range mask for flower, mask off
Adjustments applied with radial filter with color range mask

How Far Can I Tweak the Global Adjustments?

Many readers may think that much of this could be done using the adjustment sliders in the Basic panel in conjunction with the HSL panel. That is correct to some extent. But keep in mind that all other similar tones and colors will also be changed. I tried it and produced a result that is respectable, but I still favor what I obtained with the luminance mask adjustments, and I could refine that even further if I needed to. Here are the results of initial global adjustments, radial filter with luminance mask, radial filter with color mask, and the global adjustments tweaked.

Global Adjustments Only
Radial filter with luminace mask
Adjustments with radial filter, color range mask for flower
Global adjustments tweaked

In case you are wondering, the luminance range mask does not restrict the adjustments to the rose alone but spreads a little outside. Using the radial filter eraser tool, I erased the selected areas outside the flower while maintaining the same adjustments. I still prefer the unrestricted radial filter with a luminance range mask because it enhances the contrasts between the flower and its immediate surrounding area. But either option is available depending on the editing needs.

Radial filter with luminace mask
Radial filter, luminance mask, restricted to flower

Can I use a Graduated Filter? Sure!

Depending on the image and the tonality of the areas you would like to adjust, you may be able to use a graduated filter drawn outside the image area. This needs to be drawn by holding the Shift key down and dragging the graduated filter tool away from the image starting just outside the image area. Look at the screen capture of the graduated filter, global adjustments, graduated filter with luminance mask, and another attempt to fine-tune the global adjustments for comparable results. You can see subtle differences.

Image as imported to Lightroom
Global adustments only
How to draw the gradient filter outside the image
Graduated filter luminace range mask
Global adjustments tweaked
Gradient filter with luminance range mask adjustments

Final Thoughts

When it comes to editing photographs in tools like Photoshop or Lightroom, there are several ways: The right way, the best way, and my way. I presented a tool, not a rule. Use it where it may make sense, use something else if that works better. Share your thoughts and experiences to enrich the post or ask any questions you may have. That’s why there is a section called comments.

Category: Lightroom, PhotographyTag: Lightroom, Photography

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Reader Interactions

Comments

  1. Haluk Atamal

    September 5, 2021 at 12:54 am

    Thanks for the important tips, Cemal.
    All these subtle adjustments boil down to nil unless you have a properly adjusted display. I personally suffer from that and feel the need to purchase a better monitor with finer calibration possibilities.

    Take care and best regards,
    Haluk

    Reply
    • A. Cemal Ekin

      September 5, 2021 at 8:35 am

      You are right, Haluk. A properly calibrated monitor shows the subtle but important adjustment results. There are many to choose from today, you will not have any difficulty there.

      Take care,

      Cemal

      Reply

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