Flare is a term for the “flashing” phenomenon that occurs in photographs. This phenomenon occurs within the lens, originating from strong light sources outside the field of view of the lens. The strong rays enter the lens and continuously reflect between the lenses that make them come and focus on the sensor not following a conventional procedure. Because of the turbulent reflections in the optical system, it affects the path of other light rays. The consequence is to create a light with the polygon blurring, reducing contrast and even losing all the details of the image.
Factors that affect flare phenomenon include number of lens, focal length, lens design and quality, filter, dirt, location and intensity of light source.
Flare has three types: veiling, ghosting and red dot.
Veiling: This type of flare occurs when the light source is strong outside the camera’s viewing angle. How to recognize the appearance of this type of flare is when you see your photos are blurred, opaque, colors and contrast is very low. In many cases, the photo can not be used because all the details are lost.
– Ghosting: A flare consisting of a series of polygons and bright stripes in the frame that reduces the overall contrast of the image. The shape and size of ghosting are not the same; they depend on the number of leaves and the lens / lens group constituting the lens.
Red dot / Sensor is a type of flare that is represented as red dots or red streaks on the screen due to the intense light reflected between the sensor and the lens. This phenomenon often occurs on unmotivated cameras.
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Because it is difficult to edit with editing software, flare is a phenomenon that photographers are always trying to avoid. The most common way to fix is to use a hood lens. If you can afford, you can buy quality lenses coated with special anti-reflective chemicals or use a lens of focal length. If you do not prepare the device in advance, it can be dealt with by hand, paper sheet, flap cover, flashing or changing angle, layout …
Flare phenomenon in photography
While this is a phenomenon that affects the optical quality of the image, in some cases, a skilled handler can control and adjust the flare to increase the authenticity, gravity and visual impact of the image. The creative flare for the purpose of artistic creation is backlight, soft filter, breath on the lens or aid to photo editing software.