imtrio.blogg.se - Fisheye lens

Fisheye lens manual#
Fisheye lens pro#
Fisheye lens software#

Tilt the lens downward for a convex horizon.

Tilt the lens upward to achieve a concave horizon.

If you want a flat horizon, place it in the middle of your frame, and crop the photo later on to satisfy composition rules, such as the rule of thirds.

The more you close in on your subject, the larger the distortion in the resulting image will be.

The central part of the frame is less affected by the distortions.

So, how does a fisheye lens work in practice? All you need to remember to start doing serious fisheye photography is: In general, though, careful composition and choice of subject can greatly reduce the visual impact of the fisheye distortion without the need for extra editing, particularly with full-frame fisheye. IMADIO Fisheye-Hemi), to lessen the amount of distortion, or remove it altogether.

Fisheye lens software#

In some cases, you can use post-process methods, such as defishing techniques using Lightroom or more specific software (e.g.

Many people do not like the fisheye effect because they do not like the resulting distortion in the images. This image illustrates well the curvilinear barrel distortion typical of fisheye lenses. Fisheye lenses always manifest a strong curvilinear barrel distortion, as shown in the image below. In general, the shorter the focal length, the more difficult it is to rectify the lens. Rectilinear wide-angle lenses are built in such a way that straight lines in the scene will be rendered straight (uncurved) in most parts of the image, with increasing amounts of distortion towards the edges of the frame. This means they fall into the ultra wide-angle lens category. Fisheye Lenses and Optical Distortionsįisheye lenses, together with rectilinear wide-angle lenses, have a focal length less or equal to 24mm (equivalent to full-frame sensor size).

Fisheye lens manual#

Thanks to the very large depth of field, manual focusing is actually quite a pain-free process. If you are tempted to get a fisheye but don’t want to spend too much on it, do not be afraid to go fully manual. I own the fully manual Samyang 7.5mm f/3.5 UMC Fisheye lens for my Olympus micro 4/3 camera and it is a joy to use.

Fisheye lens pro#

From the $950, pro-grade Olympus M.Zuiko Digital ED 8mm f/1.8 Fisheye PRO lens all the way down to the much cheaper, but fully manual, Samyang / Rokinon / Bower fisheye lenses. And all the major camera lens manufacturers, such as Canon, Nikon, Olympus, Sigma, Sony, Samyang, etc., have a fisheye lens available in their catalog.įinally, fisheye lenses come in all sorts of prices. Relatively cheap fisheye lenses are also available for iPhone and other camera phones (e.g. (Image credit: Wikipedia.) Some Fisheye Lens Recommendationsĭue to their huge field of view, fisheye lenses are usually found in action cams (e.g. Comparison between circular (left) and full-frame (right) fisheye lenses. The photo below shows a comparison between images produced by the two kinds of lenses. This leads to a non-circular photo with a field of view smaller than 180°. A full-frame fisheye lens, however, will project an image larger than the camera sensor. While fisheye lenses will always project a circular image on the camera sensor, they can be grouped into two families: circular and full-frame fisheye.Ī circular fisheye lens will project the whole hemispherical image onto the camera sensor.

Wood, an American physicist and inventor. The term ‘fisheye’ was first used to describe these kinds of photographic lenses in 1906 by Robert W. By ‘ultra-wide hemispherical view’, I mean precisely that the lens has a 180° field of view (which is half of the 360° of a sphere, hence the term hemispherical). What Is A Fisheye Lens? The Samyang 7.5mm f/3.5 UMC MFT Fisheye lens.Ī fisheye lens is a type of lens that produces an extreme wide-angle image with distortions that make straight lines appear curved.Īs its name indicates, it is based on how a fish would see things beneath the surface of the water, with an ultra-wide hemispherical view of everything in front of it.