Every now and then when I edit an image, I see this pesky purple line around the edges of a subject or trees. It took me a while to figure out what it was. That pesky purple line is called Chromatic Aberation. As described in this great article by Photography Life:
Chromatic Aberration, also known as “color fringing” or “purple fringing”, is a common optical problem that occurs when a lens is either unable to bring all wavelengths of color to the same focal plane, and/or when wavelengths of color are focused at different positions in the focal plane.
Read more about Chromatic Aberration here.
While most people will not notice it, once you start noticing it images, you notice it in all images. Pesky little thing. The great news is that Lightroom has an extremely useful tool in the Develop module to minimize the effect. And, I would love to show you how to use it!
Open the picture that has the chromatic aberration and go to the Lens Correction section in the Develop module. There is a small purple line right around the cuff of his shirt.
Tick the 'Remove Chromatic Aberration' button and slide the Defringe amount to a value that reduces or removes the purple fringe.
That purple fringe is no longer there. Be careful when sliding the amount slider, as it may sometimes have a significant impact on other parts of your image. I used this example because the gorgeous bride-to-be is wearing a pink dress. I have seen this slider have a significant negative impact on clothing, lips, eye makeup, background items, so you have to be very careful to not over slide. You may have to settle for a little bit of purple fringe instead of none. But that is better than where you started. See what happens when I get a bit slide happy.
I commonly see Chromatic Aberration in trees, the boarders of a dark color and white, and in my ring shots. This slider really helps polish up the image! I hope this tip helped. Leave questions in comments.