This results in a ‘fringe’ running along particularly high contrast edges which is usually red or cyan. Chromatic AberrationĬhromatic Aberration is caused by a lens failing to focus all of the different colours onto the sensor at the same point. The first two are pretty easy to deal with.
There are five types I’ll talk about in this post: Halos are caused by many different things and take on slightly different forms depending on the cause. Technical mistakes break that illusion and cause mistrust. Rather I feel it has to have believability within one’s imagination. Note that I say ‘created for them’ the image doesn’t have to be realistic or accurate. I feel that part of my goal is to shut the door to the outside world and let the viewer enjoy the world which I have created for them. Anything that doesn’t seem ‘quite right’ in an image gives the viewer a chance to escape and question the making of it rather than enjoying and absorbing it. Of course our goal isn’t merely to create technically correct photographs, but such imperfections should be calculated creative decisions rather than demonstrating a lack of care or craft. It’s quite often in the details that a great piece of work is elevated over the mundane.
As with other anomalies, halos are to me like signposts that say the artist hasn’t paid enough attention to detail. They are most prominent along high contrast edges such as when the land meets the sky. Halos are bands of light (or dark) that follow edges in an image. Of all image imperfections my personal pet hate has got to be the ‘halo’.
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