A compact camera lens composed of the following five lenses in this sequence proceeding from the object side: a first positive meniscus lens, wherein the concave surface of the first positive meniscus lens faces away from the object side; a second negative lens, wherein the object-side surface of the second negative lens is concave; a third positive lens, wherein the image-side surface of the third positive lens is convex; a fourth biconvex lens; and a fifth negative lens. The fourth biconvex lens and the fifth negative lens are in each case cemented with one another. The object-side surface of the third positive lens and the image-side surface of the fifth negative lens are of aspherical form. The objective is particularly robust, compact, has a large aperture and very good imaging characteristics. It is suitable for example as an objective of an exterior mirror replacement camera in the automotive field.
1. A camera lens for imaging an object, said camera lens comprising a plurality of lenses, said plurality of lenses consisting of the following elements in the stated sequence proceeding from the object side:
a first positive meniscus lens,
wherein the concave surface of the first positive meniscus lens faces away from the object side;
a second negative lens,
wherein the object-side surface of the second negative lens is concave; and
wherein the value of the radius of curvature of the object-side surface of the second negative lens is smaller in magnitude than the magnitude of the value of the radius of curvature of the image-side surface of said lens;
a third positive lens,
wherein the image-side surface of the third positive lens is convex; and
wherein the value of the radius of curvature of the object-side surface of the third positive lens is greater in magnitude than the magnitude of the value of the radius of curvature of the image-side surface of said lens;
a fourth biconvex lens;
a fifth negative lens,
wherein the value of the radius of curvature of the object-side surface of the fifth negative lens is smaller in magnitude than the magnitude of the value of the radius of curvature of the image-side surface of said lens;
wherein the fourth biconvex lens and the fifth negative lens are cemented with one another.
2. The camera lens according to claim 1 , wherein the object-side surface of the third positive lens is formed as an aspherical surface.
3. The camera lens according to claim 1 , wherein the image-side surface of the fifth negative lens is formed as an aspherical surface.
4. The camera lens according to claim 1 , wherein the arithmetic mean of the refractive indices of all of the lenses has a value of greater than 1.8, wherein the refractive index is determined in each case for a wavelength of 587.56 nm.
5. The camera lens according to claim 1 , wherein a diaphragm is positioned between the second negative lens and the third positive lens.
6. The camera lens according to claim 5 , one of the preceding claims, characterized wherein:
the diaphragm is an iris diaphragm with a multiplicity of blades;
the blades are formed from light-impermeable material;
at least one of the blades has a cutout in the light-impermeable material and functions as a closing blade;
the cutout is covered by a neutral density filter;
the guide of the closing blade is designed such that the closing blade can completely cover the aperture which remains when the other blades are in a stopped-down state; and
the shape and position of the cutout are selected such that, when the closing blade is covering the diaphragm aperture which remains in the stopped-down state, the neutral density filter is pivoted into the diaphragm aperture which remains.
7. The camera lens according to claim 6 , wherein the two outermost blades of the diaphragm are formed as closing blades with the cutout which is covered by a neutral density filter.