FIELD: optics.
SUBSTANCE: invention relates to optical lenses. Lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, which are arranged in series from the side of the object to the side of the image. First lens, the third lens and the fifth lens have positive optical power, the second lens and the fourth lens have negative optical power, and the sixth lens has positive or negative optical power. Surfaces on the side of the object and surfaces on the side of the image from the first lens to the sixth lens comprise at least one anamorphic aspherical surface. Focal distance f1 of the first lens and the focal distance f2 of the second lens are −0.5 < f2/f1 < −0.01.
EFFECT: lens enables to realize ultra-wide-angle photography and reduce distortions with an ultra-wide-angle image.
14 cl, 29 dwg, 40 tbl
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