tutorial on lens flare

The Oro Photographic Society will embark on a photo walk Saturday evening for the weekend Night Cafe of the city at Divisoria. That means I must prepare.. and I must study on how to avoid lens flare in my night shots.

Here are the notes I've gathered:

What is Lens Flare: Lens flare is created when non-image forming light enters the lens and subsequently hits the camera's film or digital sensor. This often appears as a characteristic polygonal shape, with sides which depend on the shape of the lens diaphragm. It can lower the overall contrast of a photograph significantly and is often an undesired artifact, however some types of flare may actually enhance the artistic meaning of a photo. Understanding lens flare can help you use it - or avoid it - in a way which best suits how you wish to portray the final image.

Minimizing Flare Through a Lens Hood: A good lens hood can nearly eliminate flare caused by stray light from outside the angle of view. Ensure that this hood has a completely non-reflective inner surface, such as felt, and that there are no regions which have rubbed off. Although using a lens hood may appear to be a simple solution, in reality most lens hoods do not extend far enough to block all stray light. This is particularly problematic when using 35 mm lenses on a digital SLR camera with a "crop factor," because these lens hoods were made for the greater angle of view. In addition, hoods for zoom lenses can only be designed to block all stray light at the widest focal length.



Minimizing Flare Through Composition: Flare is thus ultimately under the control of the photographer, based on where the lens is pointed and what is included within the frame. Although photographers never like to compromise their artistic flexibility for technical reasons, certain compositions can be very effective at minimizing flare. The best solutions are those where both artistic intent and technical quality coexist.

One effective technique is to place objects within your image such that they partially or completely obstruct any flare-inducing light sources. Even if the problematic light source is not located within the image, photographing from a position where that source is obstructed can also reduce flare. The best approach is to of course shoot with the problematic light source to your back, although this is usually either too limiting to the composition or not possible. Even changing the angle of the lens slightly can still at least change the appearance and position of the flare.

The basics from Understanding Camera Lens Flare

Photo by Marcelo Alves