Nikon Corporation

Ayumu Makida

Tomoki Ito

Satoshi Miwa

Masashi Yamashita

Katsuya Watanabe

Keigo Koida

Azuna Nonaka

Yoko Komatsubara

Tomonori Kuribayashi

Hiroshi Yamamoto

Takeru Uehara

Hiroshi Yabumoto

Keisuke Tsubonoya

An optical system (LS) has an aperture stop (S), and a positive lens (L) disposed closer to the object side than the aperture stop (S). The positive lens (L) satisfies the following conditional expressions.−0.010<1−(2.015−0.0068×ν1)50.00<ν1<65.000.545<θ1−0.010<θ1−(0.6418−0.00168×ν1)where ndP1 is the refractive index to the d line of the positive lens, νdP1 is the Abbe number with respect to the d line of the positive lens, and θgFP1 is the partial dispersion ratio of the positive lens.

Optical system, optical apparatus and method for manufacturing the optical system, and zoom optical system, optical apparatus and method for manufacturing the zoom optical system

A zoom optical system (ZL), comprises, in order from an object: a first lens group (G) having a positive refractive power; a second lens group (G) having a negative refractive power; a third lens group (G) having a positive refractive power; a fourth lens group (G) having a positive refractive power; a fifth lens group (G); and a sixth lens group (G). In the zoom optical system, upon zooming, a distance between the adjacent lens groups changes. The zoom optical system satisfies the following conditional expression.1.00<4/3<3.00

Zoom optical system, optical apparatus and method for manufacturing the zoom optical system

A zoom optical system (ZL) comprises, in order from an object: a first lens group (G) having a positive refractive power; and a second lens group (G) having a negative refractive power, wherein upon zooming, a distance between the adjacent lens groups changes. The zoom optical system further comprises an aperture stop (S) disposed closer to an image than the second lens group (G, and satisfies the following conditional expression:0.10<<0.90

This optical system (LS) has an aperture diaphragm (S) and a negative lens (L) disposed closer to an object side than the aperture diaphragm (S) and satisfies the following conditional expression.−0.010<1−(2.015−0.0068×ν1),50.00<ν1<65.00, 0.545<θ1,−0.010<θ1−(0.6418−0.00168×ν1). Where, ndN1 is a refractive index of the negative lens with respect to a d-line,

An optical system (LS) has a lens (L) that satisfies the following conditional expressions.−0.010<−(2.015−0.0068×ν)50.00<ν<65.00 0.545<θ−0.010<θ−(0.6418−0.00168×ν)

Optical system, optical apparatus and method for manufacturing the optical system

An optical system (LS) includes lenses (L,L) satisfying the following conditional expressions,νLZ<35.0, and0.702<θFLZ+(0.00316×νLZ),

Optical system, optical apparatus, and method of manufacturing optical system

An optical system (LS) has an aperture stop (S), and a negative lens (L) disposed closer to the image side than the aperture stop (S) and satisfying the following conditional expressions.−0.010<2−(2.015−0.0068×ν2),50.00<ν2<65.00,0.545<θ2,−0.010<θ2−(0.6418−0.00168×ν2)where ndN2 is the refractive index to the d line of the negative lens, νdN2 is the Abbe number with respect to the d line of the negative lens, and θgFN2 is the partial dispersion ratio of the negative lens.

An optical system (LS) includes lenses (L,L) satisfying the following conditional expressions,+(0.01425×)<2.12, andν35.0,where ndLZ: a refractive index of the lens with reference to d-line, and

An optical system (LS) Includes lenses (L22,L23) satisfying the following conditional expressions,&#x3c;35.0, and0.702&#x3c;&#x3b8;+(0.00316&#xd7;&#x3bd;),where &#x3bd;dLZ: Abbe number of the lens with reference to d-line, and

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Kawaguchi, Japan

Ayumu Makida