Understanding Spherical Aberration With Our New Nour Triplet V 2.0/64 Bokeh Control Art Lens

Shooting days are tough. Many decisions are looming over your head when it comes to conveying a feeling, a mood, or making a point through your storytelling. Using the right tool makes a difference in achieving a perfect result. With the needs of creators in mind, we have designed the Nour Triplet V 2.0/64 Bokeh Control Art Lens. With this lens there is no more worrying about your choices, the right lens is the one that gives you more in one twist.

The Nour Triplet V 2.0/64 Bokeh Control Art Lens features a spherical aberration control knob that allows you to move from right to left through the center of the lens, and get three different looks in one. So how is this possible?

What Are Aberrations?

When building a lens, one must consider aberrations that require corrections. These optical imperfections in the glass react to the light in different ways, dispersing the rays. First discovered by Hasan Ibn al-Haytham, the law of refraction is the first step in understanding the aberrations that occurs when light enters an object. In short, it is the behavior of light passing through a transparent object that does not converge to a single point.

Not all light rays are created equal. Blue rays will have different wavelengths to red rays. Since all transparent materials are dispersive, the index of refraction increases as you move towards the blue spectrum of light.

Spherical aberration occurs because spherical surfaces are not the most functional shapes to make a lens. Nonetheless they are the simplest shape to which glass can be ground and polished, and therefore are often used. Spherical aberration causes beams parallel to, but distant from, the lens axis to be focused in a slightly different place than beams close to the axis. This manifests itself as a blurring of the image. And when over-corrected, this effect results in marked lines across the background of an image.

Blue light passing through a transparent prism will bend or refract more than the same red light part of the ray. The result is what is known as chromatic aberration. The falling position of the ray will affect our distortion, it is therefore with the insertion of the negative part (a concave lens) that chromatic aberration can be corrected.

There are different types of aberrations which can affect the sharpness, focus, magnification, distortion, and color of an image. Our lens has a triplet structure as its core design. This simple structure can correct most aberrations, however we have selected this formation and focused our new lens to operate with one in particular, spherical aberration.

Bubble and Soft Bokeh

Playing with spherical aberration, we can control the effects by over-correcting or minimally correcting the distortion. On one side, there is what is called a soap bubble bokeh look. Where it shows this effect, the aberration is over-corrected. On the other side of the spectrum, with minimal correction, the lens will render a soft focus glow across the frame.

There are also framing choices that allow bokeh effects to be clearly visible in a picture. For example, when the light coming behind a tree refracts, this creates a rich texture for the bokeh to be visible. Over-correcting the effect implies that the ray will pass over the center, ending up in the out-of-focus areas to look like a pencil has drawn a ring around your bokeh.

This feature can be more visibly pronounced at night. We can use neon signs and light bulbs to create wonderfully defined round shapes. Any kind of small bulb will be the best motif for your subject's background. The wider open your lens is, the more pronounced the effect will be, since the convergence of the light is not guided through a small aperture that would help the light to be channeled.

On the other side of spherical aberration control is the under-correction result that leaves light rays scattered and not converging toward the center. The sharpness at the edges of our objects and subjects is the first quality altered. This effect invokes the feeling of softness.

The soft focus effect will express a delicate feeling of charm and mystery. This feature is immediately visible throughout the image, and as soon as you frame the scene, you will see the results. The image will be in focus but that the diffusion effect of the scattering light gives a sublime and delicate aura to the picture.

We worked to give photographers the beauty of the triplet lens system, and the versatility of bokeh control. When placed in the center, this lens is able to provide a correct image, thus allowing a clean, classic look to cover every possible scenario when telling a story.

The convenience of changing effects so quickly makes this lens a jack of all trades for any photographer. Use this lens like a painter uses brushes, every stroke can help creators make unforgettable images.

Have you already made a pledge on Kickstarter? Back us today and take advantage of this opportunity!

written by eparrino on 2023-11-01 #bokeh #lomography-art-lens #spherical-aberration