Monthly Archives: November 2017
Distortion is mainly of two types – barrel-shaped (convex, Barrel distortion) and pillow-shaped (concave, Pincushion distortion). Distortion is usually called simple ‘barrel‘ and ‘pillow‘. But there is also a complex or complex distortion (complex distortion), in which the distortions in different areas of the image have a different type and intensity. Complex distortion is quite difficult to correct with the help of graphic editors, since there the distortion can be waves ’. Professional photographers are affectionately referred to as “camel’, sometimes ‘a double-humped camel‘, as such distortion often gives a kind of visual humps and depressions in the image. Continue reading
Vignetting is the effect of darkening the corners of an image. Often, vignetting is simply called ‘vignette‘
In a broader sense, vignetting is a change in the brightness of an image from the center to the edges of the image. You can also do ‘vignetting on the contrary’, when the edges are brighter than the center of the image.
The above is an example of vignetting that gives a Nikon 50mm f / 1.8D AF Nikkor lens when used on a Nikon D700 full-frame camera and with a full aperture, the lens is focused to infinity, a white sheet with a tripod is photographed. In the corners of the image, a drop in brightness is noticeable, and the brightest part of the image is in the center of the image. Continue reading