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Beginner's Guide to Spherical Aberration in Photography/Videography

Arvin Alejandro
Arvin Alejandro Originally published Sep 14, 24, updated Oct 11, 24

For those who love photography or taking random pictures, it can get a bit irritating when the images don’t turn out as we wanted. Many things can go wrong. It can be too dark or too light, the wind can mess up the flowers we’re focusing the lens on, there’s distortion, some objects are blurred, etc.

When spherical aberration happens, no one's happy. Here are some tips and tricks that will stop it for good.

In this article

Defining Spherical Aberration

spherical-aberration-picture-distortion-2.jpg

Spherical aberration occurs when the outer part of the lens fails to bring the light into the same focus as the central part. Therefore, the photo is undefined and lacks contour.

Light rays that enter the lens horizontally are not as refracted as those nearer the lens periphery, so they end up in different spots on the optical axis. This results in disbalance.

In other words, it’s when the object in the picture doesn’t have sharp edges, and the image is blurred. That happens frequently among photographers and people taking pictures with their phones.

This optical problem can be unpleasant to the eye, so we’ll discuss how to prevent it and get rid of it if and when it happens.

Causes of Spherical Aberration

Spherical aberration is usually caused by three main factors, all of which revolve around one key aspect - the lens.

These three crucial factors are:

  • Lens design
  • The quality of the lens
  • Placement of the parts inside its aperture mechanism

Sometimes, you don’t need to afford the highest-quality items, but that’s not the case with videography equipment.

The higher the quality of your camera and lenses, the better the results. The more comprehensive and rich your software, the easier and more enjoyable your work will be. Poor-quality lenses can hinder progress, so you have to be prepared and get the best tools available.

When it comes to lenses, the ones made from low-quality materials have large bubbles that affect clarity and cause inadequate light reflections. In contrast, the perfect lenses have all the light rays at one focal point.

In the last few years, many manufacturers have been working on precise formulas that will eliminate spherical aberration. However, many things could still be improved, so we need to choose the best ones on the market.

The Effects of Spherical Aberration

There are multiple adverse effects caused by spherical aberration.

It’s important to note that this effect can also be used purposely as well, for various reasons. Clients might request this style, or the photographer might personally appreciate it and use it as his signature. Therefore, while it can be a valuable tool if you decide to use it, it shouldn’t occur unexpectedly and add an unnecessary workload.

Spherical aberration causes images to be soft-focused and to lack fine details and contrast. They often blur the photos, making the objects appear unnatural. They lead to image distortion, where the edges are not sharp and clear but seem to float around. Looking at these images can make some people experience dizziness.

It also reduces the resolution, distorts the images, and spreads them asymmetrically, significantly affecting the quality.

There’s a similar phenomenon called Chromatic Aberration. If you’re wondering how they compare, you’ll soon find out.

Difference Between Spherical Aberration and Chromatic Aberration

chromatic-aberration-vs-spheric-aberration-3.jpg

These effects are very similar, yet different.

Both affect lens performance and optical systems, making images appear unclear and less sharp. The difference is that chromatic aberration is caused by the dispersion of light, meaning that varying amounts refract different wavelengths as they pass through the lens.

As a result, the picture might show rainbow colors around the edges of objects.

This happens primarily due to the material of the lens - which is glass. The refractive indices of these lenses vary for different wavelengths, causing the colors in the image to focus at different points. That might result in rainbow-like edges and color fringing. Areas with high contrast show even more pronounced colorful edges, ranging from blue and red to green and even yellow.

Simply put, spherical aberration is related to lens geometry and shape, causing blurriness, while chromatic aberration is caused by varying light wavelengths and promotes color fringing. Both of these issues can be combated with the right strategies and methods, so it’s time to reveal those.

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Methods for Reducing Spherical Aberration

Now you know what spherical and chromatic aberrations are, but information about a problem without the knowledge to solve it isn’t worth much. So, let’s see the solution.

There are both simple and more advanced options for reducing spherical aberration.

The simplest method is to implement Stops, reducing the effective lens aperture. That means the lens opening will restrict the incoming light to a controlled amount. However, this approach has its downsides: while it helps control the light entering the lens, it can result in a darker image.

Spherical aberration becomes even more noticeable as the lens diaphragm opens wider, so not opening it to the maximum can help mitigate this issue. Still, it may lead to other potential problems, such as those mentioned above.

A more complex method is to use a specialized aspheric lens surface, which features a moderate outward curvature that ensures the rays intersect at a single point. This technique is more optimal and requires an extra component, but it is well worth the effort.

Chromatic aberration can be reduced by using special optical elements designed to counteract chromatic effects and manage light rays more effectively.

Bonus: How to Fix Chromatic Aberration Easily

Fixing distortions in Wondershare Filmora is exceptionally easy because of its intuitive interface.

The entire process of fixing the aberrations in your images will take just a few steps.

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Step 1: Open Filmora and click New Project to upload your file.

You can invoke the Command +I buttons on your keyboard to begin the import. After successfully uploading your file, use the drag-and-drop function to position your file on the Timeline.

filmora new project

Step 2: After selecting the timeline file, click Color in the upper toolbar. This option allows you to fine-tune settings such as Contrast, Saturation, Brightness, and Tint. You’ll be able to manually adjust the parameters you decide and change the features of your file.

Step 3: Locate the Sharpen Option. Once you click the Color option, scroll down until you locate and enable the Adjust slider. Then expand it and choose the next option, Sharpen slider. Chromatic aberration is often pronounced due to blurriness, so applying the Sharpen filter will be super efficient in reversing it. Adjust the intensity as needed.

filmora sharpen tool

Step 4: Use built-in Presets and Plugins. Premium and advanced software like Filmora has a variety of Presets that you can use to reduce the aberration effect, so try them out and see which ones help.

Step 5: Review and Export your file. Preview your file and see if you need to make any additional tweaks. If there are, you can continue fine-tuning color correction and sharpening until the chromatic effect is minimized.

The Most Powerful Color Grading_Episode 04 | Filmora Master Class

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Conclusion

Color distortion can affect the overall quality of your images and videos. It’s frustrating to adress it if you don’t possess the right tools and methods. These tools can be physical or high-tech software solutions like the ones we’ve discussed. It’s ideal to have both, so you’re all set and prepared, but even if you don’t have top-notch cameras and lenses, powerful software like Filmora can take you very far!

Now that you know the secrets to reversing aberrations, you can confidently create amazing pictures and happy memories!

Arvin Alejandro
Arvin Alejandro Oct 11, 24
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