The desire for creativity inspires many photographers and encourages them to study and use various creative devices in their work. In this article, you will learn about devices such as fractal filters, and what they can bring to your photo.
What is a prism?
Prism is a transparent polyhedron, the bases of which are in parallel planes, and the side faces are parallelograms. For photography, a prism with triangular bases is usually used. Typically, a prism is made of glass or crystal, but can also be made of transparent acrylic. One of the best-known properties of a prism is the creation of a rainbow using an effect known as dispersion of light (decomposition of light into a spectrum).
The decomposition of light is not the only thing a prism can do. Refraction also occurs in it – the refraction of rays passing through its lateral faces. This means that you can see in the prism an image that is at an angle of 90 degrees to the angle that you are actually viewing. This effect, among others, is used in fractal filters. Continue reading
Lens distortion is a common problem that photographers face daily. Distortions can be divided into two groups: perspective distortion (when lines parallel in reality become convergent) and optical distortion (distortion). Distortion often causes unnatural deformation of photographs, straight lines in the image become curved, except for lines in the same plane with the optical axis.
Distortion is different in the type of impact on the line, usually there is a cushion-like distortion (parallel lines in reality are concave) or barrel-shaped distortion (the lines are convex, like in a barrel). Distortion is much more noticeably closer to the edges of the frame than in the middle. Long focal length lenses give Continue reading