What Are the Effects of Fisheye Lens?

Ⅰ. What are fisheye lenses?

A fisheye lens is a type of super wide-angle lens that aims to view as far as the human eye can perceive, if not farther. However, there is a significant difference, because what we perceive in real life is a regular, fixed form, whereas the illusion created by fisheye lenses is more complex. The front lens has a small diameter and a parabolic projection towards the front of the lens, akin to a fish's eye, to provide the lens with the largest photographic angle of view, thus the moniker fisheye lenses.

The larger the angle of vision, the shorter the focal length, and the greater the angle of view, the more acute the distortion due to optics. The creators of the fisheye lenses had to make the compromise of permitting this distortion (barrel distortion) to be justified to attain a very large viewing angle of 180 degrees. As a result, any other objects that should be horizontal or vertical are adjusted correspondingly, except the frame's center, which remains intact. It is this powerful visual effect that allows the innovative and bold photographer to show off his or her talent.

Ⅱ. The functions of fisheye lenses

1. Eye-catching foregrounds may have a big visual effect.

2. The depth of field might be anything between a few millimeters and infinity.

3. For the topic, use as few lines and surfaces as feasible; while composing, strive to place the subject in the center of the picture to minimize distortion.

4. on the other hand, to emphasize the appearance of aberrations, pick as many horizontal lines and immediately recognized the landscape as possible near the picture's edges.

5. When framing the shot, look at the corners of the viewfinder to check whether any of the photographer's hands, feet, camera straps, or the photographer himself are getting in the way of the aesthetic impact.

6. The normal color filters are not accessible for most fisheye lenses.

The first and most important step for photographers who want to utilize fisheye lenses is to pick which look they want to achieve. Fisheye lenses, fisheye add-on lenses, and a homemade gadget are all available in three sizes. True fisheye lenses are only available on 35mm SLR cameras. The focal length of the lens is around 8mm. The picture is spherical, with an angle of vision of 180 degrees; a few versions with a 220-degree angle of view are available, but they are mostly used for technical photography. Because fisheye lenses are made up of several optical lenses that must be carefully molded and fitted, they are expensive.