Anamorphic lenses are a special lens that affects how the filmed scene is projected onto the camera sensor. The cinematic look of this technology has captured the imagination of filmmakers around the world. Anamorphism was created in such a way that a multitude of aspect ratios could fit into a normal film frame.
Anamorphic lenses produce oval-shaped bokeh and are characterized by a shallow depth of field, a way of making out a focal point of light that must have a lower depth of field.
Anamorphic lenses originally had a 2-fold squeezing, which meant they recorded twice as much horizontal information as a spherical lens. Spherical lenses project a circular image onto the film, while anamorphic lenses project an oval image.
The additional glass elements in anamorphic lenses can affect image sharpness, although some filmmakers prefer the softness of the glass when working with it, as it can reduce the overly clinical character in film shots. The distortion of the lens caused by anamorphic lenses can also make it difficult to work on visual effects. Wide-angle or "anamorphic" lenses have more distortion than spherical lenses, making it difficult to obtain a straight vertical image.
Therefore, anamorphic lenses are necessary to be displayed correctly. In the right project, however, they can increase the value of production and give a film a unique cinematic touch.
Anamorphic lenses were originally designed for large format images that should be used to their full potential. Spherical lenses cannot capture wide enough images, as most digital sensors have a maximum aspect ratio of 1: 1.5, and spherical lenses do not. In some cases, the use of anamorphic lenses results in unnecessarily high aspect ratios, with side images not being used and horizontal resolution reduced. Sources: 1, 4
Spherical lenses cannot capture wide enough images, as most digital sensors have a maximum aspect ratio of 1: 1.5, and spherical lenses do not. Anamorphic lenses improve image quality when high aspect ratios are required to capture a digital sensor. In some cases, the use of anamorphic lenses results in unnecessarily high aspect ratios, which result in unused side images and reduced horizontal resolution.
If the required aspect ratio is unusually high, the vertical cropping of the image will result in more pixels. If you do not achieve a ratio of 2: 7: 1 with a silui lens and crop the images, you get a ratio of 2: 1, which is a little wider than 16: 9. This is because anamorphic lenses use standard lenses, so the light points that come out of focus become blurred.
This still image will look like something you've always dreamed of, but not quite as good as the original.
In fact, anamorphic lenses have many artifacts and imperfections that their anamorphic film look gives them. Apart from the obvious wide-ratio, the most common anamorphic look is the horizontal lens streak. The large focal length gives the morph footage an almost "3D" feel, but distortions can also occur in other ways, such as vertically stretched bokeh and distortions of the background.
Bokeh, flares, and vignetting will appear similar to spherical lenses, but the depth of field will still be flatter. Anamorphic lenses are not as sharp as the corresponding spherical lens because they have additional glass elements in the optical path, so images are created with an ultra-wide-angle view. Rear-mounted anamorphic lenses often reduce the maximum aperture available. This is because they increase the effective focal length and not the additional lens elements.
The end result is sharper because the image is enlarged with less projection, but the big advantage is the ability to project an image with the optics that can be used in a much wider viewing angle, which leads to so much more. Sources: 4, 6
The additional resolution makes a big difference, but there are also major aesthetic differences that can be created with the new anamorphic lenses in terms of color, detail, and even the overall image of the image.
The frequently quoted claim that anamorphic lenses produce a lower depth of field is not entirely true, however. In many ways, spherical lenses mimic the way the human eye sees, and when you look at material twisted with them (as is typically done with modern lenses without aberration or distortion), you can see things differently. In reality, however, they can distort reality in a way that is completely different from how our vision works.
Anamorphic lenses take the cylindrical elements of the lens and twist them into a spherical shape. Camera operators can use a 50 mm lens when they would otherwise use an 18 mm lens or even a 20 mm lens for a larger field of view.
The resulting effect is a panoramic aspect ratio, but without the use of a special lens, the image is squeezed so that it could take up more vertical space to fit the larger image. If the lens uses the exact opposite of squeeze, the film material would compress so much that you could take it out - squeeze it to bring the proportions back to normal.