How to Sharpen a Soft or Slightly Blurry Photo
In the Light tab raise Sharpen (0 to 10) and a little Clarity. For more control choose Filter > Sharpen > Unsharp Mask and set Amount, Radius and Threshold. Sharpening helps slight softness, not heavy blur.
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#1. Zoom in to judge the softness
Judge sharpness at 100% zoom (the 1:1 button at the top). This street photo is a little soft, and the edges on the rooftops are smeared.

#2. Raise Sharpen and Clarity in the Light tab
Open the Light tab. Under Detail, drag Sharpen (0 to 10) up to around 8 and add some Clarity (40 here). Clarity adds local contrast so edges stand out. Move both slowly and watch for halos around edges.

#3. Check the result
The edges are crisper and the roofs have texture again. Compare with the original using the eye button.

#4. For more control, use Unsharp Mask
Open Filter > Sharpen. The submenu has Sharpen, Sharpen More, Unsharp Mask…, Smart Sharpen… and High Pass…. Unsharp Mask has Amount (120% by default), Radius (1.5 px) and Threshold (3), plus Opacity and Blend mode. Use a small radius for fine detail and a bigger one for large, soft photos.

#Tips
- Sharpen last, after cropping, resizing and color work.
- To sharpen only part of the photo, such as the eyes in a portrait, make a selection first.
- Sharpening can't rebuild detail that was never captured, so heavy motion blur or badly missed focus won't be fixed.
#Questions
- Can you fix a blurry photo?
- You can improve a slightly soft photo with Sharpen, Clarity or Unsharp Mask. A photo with heavy blur doesn't contain the detail needed to bring it back.
- What is the difference between Sharpen and Clarity?
- Sharpen enhances fine edges. Clarity adds contrast to mid-sized detail, which makes the photo look punchier.
- What is Unsharp Mask?
- It is a classic sharpening filter that boosts contrast along edges. Amount sets the strength, Radius sets the width of the edge effect and Threshold decides which edges to ignore.
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