Lencserejelenség

Lencserejelenség is a Hungarian term that translates to "lens ghosting" or "lens flare" in English. It refers to a visual artifact that occurs when bright light sources, such as the sun, streetlights, or even reflections, enter a camera lens and are scattered within the optical system. This scattering can produce a variety of visual effects, including circular or polygonal shapes, streaks, and hazy areas within an image.

The appearance of lencserejelenség is influenced by several factors. The design and coatings of the lens play a significant role, with more complex lens elements and anti-reflective coatings generally reducing its occurrence. The aperture shape of the lens also affects the form of the ghosting, as the number of blades in the aperture diaphragm can determine the number of points on polygonal flares. The angle and intensity of the light source are also crucial; direct or near-direct light hitting the lens is more likely to cause significant ghosting.

While often considered undesirable, lencserejelenség can sometimes be used creatively by photographers and filmmakers to enhance the mood or aesthetic of a shot. However, in most contexts, photographers aim to minimize or eliminate it through careful composition, lens choice, and the use of lens hoods or other light-blocking accessories. Understanding the causes and characteristics of lencserejelenség helps in both avoiding it and potentially utilizing it for artistic purposes.