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Apr 15, 2021 · Here, you will learn why they appear and how you can avoid them. We can roughly differentiate between two types of fringing: chromatic aberration and so-called “halos”. Here, we will talk ...
- Nils Heininger
- Chromatic Aberration
- Sharpening
- Excessive Clarity
- Spillover
- Luminance Changes
- Phew!
Chromatic Aberration is caused by a lens failing to focus all of the different colours onto the sensor at the same point. This results in a ‘fringe’ running along particularly high contrast edges which is usually red or cyan. It is most prominent when using poorer quality lenses but even top of the range lenses exhibit the problem to some degree. W...
Sharpening basically increases the contrast of edges at a micro level, darkening the pixels on one side and lightening the pixels on the other side. As you apply more sharpening (using the Amount slider in LR) then the degree of darkening/lightening applied to the edge increases. In LR the Radius setting determines how many pixels from an edge shou...
The third type of halo is to me much more obvious when looking at an image. It may have a proper name, but I’m just going to call it an ‘edge contrast halo’ as it is chiefly contrast changes along an edge that cause the problem. This may sound similar to what I just talked about regarding sharpening, and that’s because approach is very similar but ...
While we're talking about adjustment brushes, another common halo comes from heavy handed use of adjustment brushes that I call ‘spillover’. This is where an adjustment is made but not confined within the appropriate area, causing other parts of the image to be incorrectly affected. Most often this might be brightening a mountain ridge, a tree or a...
Finally for this post Lightroom's Hue-Saturation-Luminance (HSL) panel can also cause you halo problems. The most striking example is where you have an object with a bright blue sky behind. A common adjustment is to lower the luminance of the Blues to darken down the sky to give it more ‘pop’ (sort of mimicking the effect of a polariser). However i...
We’re done. Though lengthy, hopefully the above gives you an idea of things to look out for and suggestions on avoiding them. It’s impossible to cover every eventuality in a post but I think I’ve knocked off the most common culprits. My final trick is to use an adjustment brush with negative Clarity. As well as undoing an overly strong Clarity adju...
- contact@duncanfawkes.com
You can use this effect artistically. However, in macro shots the depth of field is very limited (depends on the aperture, the focal length and the distance to subject). So if you want to take a sharp image of a bigger subject, this may be difficult or impossible.
Jun 14, 2022 · Halos at high contrast edges can ruin an otherwise beautiful landscape image. I’ll show you how to find what is causing a halo, and how you can reduce and even remove them.
Oct 18, 2024 · Learn how to capture flawless photos by eliminating the halo effect, a common issue that can impact the quality of your images.
Feb 23, 2024 · To eradicate the Halo Effect, one must first understand its origins. Some common culprits include: High levels of clarity and sharpening. Improper use of masks. Blurry edges resulting from poor alignment of layers. Excessive noise reduction. Insufficient color correction. Strategies to Reduce or Eliminate the Halo Effect
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Halos are harder to spot in higher-resolution images that must be zoomed in (100% screen magnification) to be seen accurately. The worst is seeing them after an image is printed on a large scale. This time-consuming and expensive mistake can easily be avoided by looking closely at images before processing is finished. Don't Produce Them.
