Chromatic aberration in photography

Date:

2018-03-20 22:24:09

Views:

513

Rating:

1Like 0Dislike

Share:

Table of contents:

Chromatic aberration-it's the kind of image distortions arising from the imperfection of optics. This phenomenon is caused by dispersion of light when passing through the lens. It is due to the fact that rays with different wavelength (different colors) have different refractive index. White beam is decomposed into a spectrum of all rainbow colors, and the colors are refracted at different angles and focus on different planes.

Chromatic aberrations often lead to the appearance of colored contours, spots and streaks, which reduce the sharpness of the image and is particularly noticeable in the transition of contrasting objects. A clear example is the tree or building on the background of the Sunny sky. Most strongly this defect is manifested in the open aperture.

In modern lenses (i.e., lenses give chromatic aberration) use low-dispersion elements, which give less refraction and the clearer the picture. From Nikon these lenses are denoted by ED (Extra-Low Dispersion). For this purpose aspheric lens to produce an image with a smaller number of such defects. There are also camera with automatic control of aberrations.

But if the existing lens still gives these distortions, there are numerous ways of dealing with them. You can apply filters, edit photos in one of the editors, or use a plugin that suppresses chromatic aberration. How to remove these artifacts using Adobe Fhotoshop quickly and easily? One of the options below.

Recommended

The rating icons in silver. Assessment of ancient icons photo

The rating icons in silver. Assessment of ancient icons photo

The Old Orthodox icons are of great interest to collectors worldwide. It is not only the object of aesthetic and spiritual enjoyment. Old icons are a win-win investment. As a special kind of antique, these are highly appreciated in the market, and th...

Crochet swimwear crochet

Crochet swimwear crochet

So you want to be different! So you want to be irresistible! So you want to see on the figure admiring glances and hear behind rapturous sighs.  Although rare, a woman openly admits it. and don't! You just need to tie swimsuit crochet, so&hellip...

Conclusion

Conclusion

Artistic gymnasts, for whom sport – this is life, the lion's share of time to devote to training and participation in competitions. During this period, they manage to demolish more than a dozen gymnastics leotards. So mom young athletes are con...

Open RAW file in Photoshop, it picked up Adobe Camera Raw. Next, go to the Lens Corrections tab. The parameter specified Defringe All Edges, then the edges become less bright. Now start moving the sliders – first Red/Cyan until, until you fade away blue border, then a Blue/Yellow before the moment disappears when the color of the areola. All the ready. 

Pictures in JPEG format can be edited using the filter Distort-Lens Correction. It is easy to get rid of chromatic aberrations with Adobe Lightroom. The advantage of the latter is that by treating one, you can use the same settings for the entire series by using the Sync function.

The easiest, but not always the correct way to remove these annoying artifacts – to translate the black-and-white format or initially to shoot in black and white. In addition, knowing that the lens suffers from this drawback, you need to avoid pictures on aperture. 

Most often, chromatic aberrations occur in lenses having a large zoom ratio. The fact is that at different focal lengths, these distortions are manifested in different ways, therefore to calculate and compensate for all defects in such a complex scheme is extremely difficult. That's why lenses with a fixed focal length give better picture and are usually much more expensive than a “Zuma”.

There are other aberrations of optical systems. When using spherical lenses spherical aberrations occur related to the difference in the distribution of light in the middle of the lens and edges. Expressed this defect in lubrication, resembling a halo. To blur the image and lead to such aberrations as coma and astigmatism. Another common defect, particularly typical for wide-angle and telephoto lenses-optical image distortion, which significantly exaggerates the sense of depth of the frame. It is expressed in curved lines  and can be convex and concave.

Most of the aberrations in the present, it is easy to correct in photo editors. But sometimes, knowing the features of its equipment, it is easier to take them into account when shooting and to avoid bad angles.


Article in other languages:

AR: https://tostpost.com/ar/cars/7586-what-is-the-exam-in-the-traffic-police.html

BE: https://tostpost.com/be/a-tamab-l/13550-shto-zh-uya-lyae-saboy-ekzamen-u-d-bdr.html

DE: https://tostpost.com/de/autos/13553-was-ist-eine-pr-fung-in-der-verkehrspolizei.html

ES: https://tostpost.com/es/coches/13560-que-es-un-examen-en-el-gbdd.html

HI: https://tostpost.com/hi/cars/7592-what-is-the-exam-in-the-traffic-police.html

JA: https://tostpost.com/ja/cars/7588-what-is-the-exam-in-the-traffic-police.html

KK: https://tostpost.com/kk/avtomobil-der/13553-b-l-b-ld-red-emtihan-gibdd.html

PL: https://tostpost.com/pl/samochody/13540-co-to-jest-egzamin-do-policji.html

PT: https://tostpost.com/pt/carros/13534-o-que-um-exame-de-pol-cia-de-tr-nsito.html

TR: https://tostpost.com/tr/arabalar/13556-nedir-bu-s-nav-traf-k-polisi.html

UK: https://tostpost.com/uk/avtomob-l/13550-scho-zh-yavlya-soboyu-spit-v-gibdd.html

ZH: https://tostpost.com/zh/cars/8252-what-is-the-exam-in-the-traffic-police.html






Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

Comments (0)

This article has no comment, be the first!

Add comment

Related News

How to sew a fairy costume Tinker bell with your hands?

How to sew a fairy costume Tinker bell with your hands?

a Wonderful tale of Peter pan j. Matthew Barry and her mischievous characters equally like both boys and girls. Therefore, your daughter will surely be happy to offer to put on a Christmas party fairy costume Tinker bell. Own hand...

Crochet beret crochet - a real pleasure

Crochet beret crochet - a real pleasure

spring Came, the orders poured in on knitting beret crochet. Stuck in the Internet in search of suitable models for the lovely ordered it. Information pleased with its abundance and diversity, in a word, there is plenty to kn...

The decoration of the Royal times - embroidery cutwork

The decoration of the Royal times - embroidery cutwork

Embroidery is one of the oldest ways of decorating clothes and household items. Starting with the simplest stitches, she gradually began to improve and become more complex. Some of the embroidery very complex in execution and affo...

Like birds of a plastic bottle mood?

Like birds of a plastic bottle mood?

How interesting our world is arranged! There is a constant circulation of substances in nature. People also have to learn not to gather around the mountain of garbage, and find a good use for any waste material.Creating around her...

Openwork sweaters knitting with diagrams and description. Openwork sweaters summer: models, patterns

Openwork sweaters knitting with diagrams and description. Openwork sweaters summer: models, patterns

Openwork sweaters, summer or winter, almost never go out of fashion. Of course, from year to year change of cuts, fits and patterns, but jewelry is hand-knitted is still relevant and valuable. Moreover, many quilters have come to ...

The cross-stitch biscornu: the diversity of ideas

The cross-stitch biscornu: the diversity of ideas

cross stitch is a lovely pastime: repetitive movements of the needle soothe the nerves, a beautiful combination of colors pleasing to the eye and make you think about enjoyable and no need to intensively reflect on the job often h...