![]() That’s pretty clever when you consider that a zoom lens is continuously realigning those glass elements.Īnd those glass elements are not just there to deal with chromatic aberration – they serve a whole range of purposes to deliver crisp images without distortion.Ĭhromatic aberration occurs when the lens design, or defects in the glass, cause the colour wavelengths to not meet at the same point on the sensor. The job of the lens is to control and direct the split light to hit the camera’s centre in unison so that the camera can read the colour and light correctly.īut you also need to keep in mind that in most lenses, the light is passing through several glass elements with each impacting how the wavelengths travel.Ĭamera lens designers and engineers go to extreme effort to ensure that each wavelength hits the sensor correctly. When it hits the lens, the colours or wavelengths are split and then travel at slightly different angles. The term colour dispersion comes from when the lens disperses the light incorrectly.Īs light hits a lens and then passes through, it’s a lot like a glass prism. Light travels in colour wavelengths and, in an ideal world, each of those wavelengths should hit the sensor, or focal plane, at the same time. Let’s go into more detail on why chromatic aberration occurs to better understand how to manage it.Ī typical lens allows light to travel from the front element to the sensor. The former deals with colour, while the latter is to do with lens curvature. Often confused, Chromatic and Spherical Aberration are not the same thing. The contrast between the leaves and the bright sky peeking through the gaps will show up with fringing.Ĭhromatic aberration can impact the look of an image as all too often it is sticks out like a sore thumb and ruins the appeal of the photo.įortunately, a lot is going on behind the scenes to manage chromatic aberration, and we’ll cover this in detail. One of the most common types of chromatic aberration appears when you take a photo of a tree. You’ll notice this the most when there’s a lot of contrast. ![]() While the most easily identifiable is usually a purple fringe, the fringe can also appear as red, green, blue, yellow, or magenta. ![]() Impacted images will show subjects with blurred edges with ‘fringing’ of various colours. There are two primary forms of chromatic aberration: Longitudinal Chromatic Aberration and Lateral Chromatic Aberration. The issue is caused by how light travels through the lens and refracts by the glass elements inside. It’s one of the most common problems photographers experience for several reasons. © 2000-2023 Outdoor Eyes Outdoor Eyes Forum All rights reserved.Chromatic aberration is known by a few other terms including colour fringing, purple fringing and even colour dispersion. Once you see that the chromatic aberration has been cleared, stop and click on OK.Ĩ. Move the image around the screen to make sure all the chromatic aberration is eliminated from the whole image. Be careful to keep the spectrum in the Magenta level. The screen displayed below will be displayed.ħ. Slowly push the color ramp (see D) either up or down the spectrum. You may want to change these numbers slightly depending on the image. The screen displayed below will be displayed.ĥ. Click on the Edit down arrow and change the color to Magentas (see A).Ħ. Change the Saturation to -80 (see B) and the Lightness to +16 (see C). Choose File -> Open -> Enter the image name to be fixed.Ģ. Hold the Ctrl Key down and hit the + key a few times to zoom the image to 100%.ģ. Move the image on the screen so that the chromatic aberration is visible.Ĥ. Choose Image -> Adjust -> Hue/Saturation. It does not completely fix the problem, but it makes it less visible.ġ. Open the file. This technique replaces the magenta color with a lighter gray shade. How To Repair Chromatic Aberrations With Adobe Photoshop ![]() Using software applications such as Adobe Photoshop, it is possible to decrease the visibility of the chromatic aberrations. The bottom line is that it is an inherent problem with some digital cameras and it normally occurs when an area of a photograph is overexposed. Numerous technical articles written about the cause of this complaint. And, of course, it seems to be the ones that you favor the most. ![]() It seems that there are always a few of your photographs that manage to have some "Purple Fringing" with digital cameras. ![]()
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