Nikon Working on 18-135mm F3.5-5.6 APS-C Mirrorless Lens with Silent AF

The latest patent published this year shows up a 18-135mm Lens with F3.5-5.6 aperture. The lens is designed and developed for APS-C sensor based Mirrorless camera. One of the important feature described in the patent is Lens features silent and Fast AF motor inside, to make it more compatible with Video oriented Mirrorless camera.

TNC Exclusive: Nikon is working on 18-135mm F3.5-5.6 lens for mirrorless camera. The 18-135mm lens is designed specially to record videos without any Auto-Focus Noise. The lens is made for APS-C Sensor based mirrorless camera. Take a look at the details of the patent image.

Nikon working 18-135mm lens with Silent AF Lens Patent Image

Patent Translated Details

To provide a variable power optical system in which a focusing lens group is made more compact and lighter, an optical device and a manufacturing method for the zoom optical system.SOLUTION: A variable power optical system comprises, in order from an object side, a first lens group G1 having positive refractive power, a second lens group G2 having negative refractive power, a third lens group G3 having negative refractive power, a fourth lens group G4 having positive refractive power, a fifth lens group G5 having negative refractive power, and a sixth lens group G6 having positive refractive power, and is configured such that distances between respective lens groups change when varying power from a wide-angle end state to a telephoto end state, the third lens group G3 moves in an optical axis direction when focusing from an infinity object to a short distance object, and at least a part of the fifth lens group G5 moves so as to have a directional component orthogonal to the optical axis. The variable optical system satisfies a following expression: 0.80<f5/f3<1.30, where f3 represents a focal length of the third lens group G3, and f5 represents a focal length of the fifth lens group

Next, the camera is an optical apparatus provided with the variable magnification optical system ZL according to the present embodiment will be described with reference to FIG. 11. The camera 1 is a lens interchangeable type so-called mirrorless camera equipped with a zoom lens system ZL according to the present embodiment as an imaging lens 2. In the camera 1, light from an object (not shown) (object) is focused by the imaging lens 2, not shown OLPF (Optical low pass filter: the optical low-pass filter) through the imaging surface of the imaging unit 3 forming an object image on. Then, the image of the object is generated object image by a photoelectric conversion element provided in the imaging unit 3 is converted photoelectrically. This image, EVF provided in the camera 1: is displayed on the (Electronic view finder electronic viewfinder) 4. Thus photographer can observe an object through the EVF 4.

When the release button (not shown) is depressed by the photographer, an image is photoelectrically converted by the image pickup unit 3 are stored in a memory (not shown). In this manner, the photographer can take a picture of the object by the camera 1. In the present embodiment, an example has been described mirrorless camera, the variable magnification optical system ZL according to the present embodiment in a single-lens reflex type camera to observe the subject by the finder optical system has a quick return mirror in the camera body even when equipped with, it is possible to achieve the same effect as in the camera 1.

Thus, the optical device according to the present embodiment is provided with the variable magnification optical system ZL having the above-described configuration, suppressing the change in the size of the image during focusing (focusing), further, during zooming , and it is possible to realize an optical device well suppressing variation in aberrations upon focusing.

Incidentally, the following description may suitably be applied within limits that do not deteriorate optical performance.

Also see – Nikon Patent 18-55mm F3.5-5.6 Lens for APS-C Mirrorless-Camera

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