Negative lens
Is a simple concave lens that causes rays of light to diverge away from the optical axis.
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As the negative lens L2 moves from the front to the back of the lens, the lens L1 moves forward and then backward in a parabolic arc.
A type of lens design with a negative lens element positioned in front of the diaphragm and a positive lens element positioned at the rear of the diaphragm.
It can be improved by the optical combination of positive and negative lens elements. Find out more.Dodging Selectively lightening part of a photo using an image editing program or a mechanical technique in a traditional darkroom.
 See also: Negative, Lens, Lenses, Camera, Image
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