Fujifilm Corporation

Fuji Photo Film Company, Limited

Other

Fuji Photo Optical Co., Ltd.

Fujifilm Corpoation

Michio Cho

Taiga Noda

Takayuki Noda

Hiroki Saito

Masato Kondo

Toru Ito

Ukyo Tomioka

Tetsuya Ori

Takashi Tanaka

Daiki Kawamura

Yoshikazu Shinohara

Takuya Tanaka

Ko Aosaki

Takashi Kunugise

Hideo Kobayashi

Seimei Ushiro

Kazunori Ohno

Kazumi Koike

Yoichi Iwasaki

Kazuya Yoneyama

Kazuyoshi Okada

Tokuji Sato

Daiki Komatsu

Noboru Koizumi

Hiroshi Ohmura

Hiroshi Yamada

Kazuhiko Onda

Tomoyuki Baba

Shigenori Goto

Kimiaki Nakada

Shinkichi Ikeda

Hideo Kanda

Katsuji Ozawa

Tatsuro Iwasaki

Tatsuyuki Ogino

Kiyotaka Kobayashi

Hiroshi Endo

Kenji Ito

Yousuke Naruse

Nobuaki Toyama

Yoshiaki Ishii

Yasutaka Shimada

Masashi Takamura

Keisuke Harada

Masayasu Konishi

Toshio Sasaki

Kenta Namioka

Mitsuru Shimizu

Sumihiro Nishihata

Takao Koda

Atsushi Misawa

Takeshi Misawa

Takeshi Watanabe

Hirokazu Kobayashi

Kenji Suzuki

Kazuya Oda

Tetsu Wada

Takashi Suzuki

Kazuo Kamata

Kenichi Sato

Akiko Nagahara

Yasunobu Kishine

Masaya Tamaru

Nobuyuki Kameyama

Yasuhiko Tanaka

Nanae Sakuma

Motoari Ota

Tsutomu Tanaka

Seiji Asano

Ryoko Otomo

Katsuhisa Tsutsumi

Toshihiro Aoi

Yukitaka Takeshita

Kensuke Masui

Ryoko Tomioka

Yasuhiro Nishitani

Shunsuke Miyagishima

Ping Sun

Shigeru Kondou

Daisuke Kusuda

Hajime Inukai

Kazunaga Shimizu

Takayuki Saito

Masane Suzuki

An imaging lens includes a positive first lens group and a second lens group, which are continuous in order from the position closest to the object side, as lens groups. During focusing, the distance between the first lens group and the second lens group changes. A stop is disposed closer to the image side than a lens which is second from the object side. A combined refractive power of all lenses closer to the object side than the stop is positive. The imaging lens includes an LA positive lens and an LB positive lens that satisfy a predetermined conditional expression at a position closer to the object side than the stop. An Abbe number of the LB positive lens is the maximum among Abbe numbers of all positive lenses closer to the object side than the stop.

Imaging lens and imaging apparatus

An imaging lens includes, successively in order from a position closest to an object side, a positive first lens group that does not move during focusing, a stop, and a positive second lens group that moves during focusing. The second lens group consists of all lenses that integrally move during focusing. The imaging lens satisfies predetermined conditional expressions.

A zoom lens includes a positive first lens group, a negative second lens group, a positive third lens group, and a subsequent group consisting of plural lens groups in order from an object side. In a case of zooming, an interval with an adjacent lens group is changed. The third lens group includes two uncemented positive lenses consecutively arranged in order from a side closest to the object side to an image side. A lens group closest to the image side in the subsequent group consists of a negative meniscus lens having a concave surface toward the object side and a positive lens having a convex surface toward the object side in order from the object side to the image side.

Zoom lens and imaging apparatus

A lenshas unevenness within an optical effective diameter D of an optical surface, an arithmetic mean roughness Ra within the optical effective diameter D of the optical surfaceis 20 nm or more and 50 nm or less, and an average value of widths W of protrusion portionsof the unevenness on an average line Cof a roughness curve Cof the optical surfaceis 1/200 or more and 1/50 or less of the optical effective diameter D of the optical surface. The lensis suitably used as a lens that composes a zoom lens or an imaging lens.

Lens, zoom lens, and imaging lens

An imaging lens consists of, in order from the object side, a first lens group, a stop, a positive second lens group, and a third lens group. During focusing, at least the second lens group moves and the third lens group does not move. The second lens group includes at least two negative lenses. The third lens group consists of one negative lens and one positive lens.

The imaging lens consists of, in order from the object side, a first positive lens group, a stop, a second positive lens group, and a third negative lens group. The first lens group includes a negative lens which has a concave surface on the image side, and two positive lenses which are disposed to be closer to the image side than the negative lens and which have respective convex surfaces on the object side, convex surfaces on the object side. The second lens group includes an aspheric lens, and two sets of cemented lenses disposed to be closer to the image side than the aspheric lens. The third lens group consists of one lens component.

A zoom lens includes a positive first lens group, a negative second lens group, a positive third lens group, a positive fourth lens group, and a fifth lens group in order from an object side. In a case of zooming, an interval with an adjacent lens group is changed. The third lens group includes two positive lenses consecutively arranged in order from a side closest to the object side to an image side. The fifth lens group consists of a negative meniscus lens having a concave surface toward the object side and a positive lens having a convex surface toward the object side in order from the object side to the image side.

The imaging lens comprises, successively in order from the object side, a positive first lens group that does not move during focusing, a second lens group that moves during focusing, a stop, and a positive third lens group that consists of all lenses moving integrally with the second lens group during focusing. The composite focal length of the second lens group and the third lens group is positive. The first lens group includes four or more positive lenses and three or more negative lenses. The imaging lens satisfies predetermined conditional expressions.

Provided are an imaging apparatus, an imaging method, and a program that can directly determine a sensor position at which an image with good image quality is obtained from obtained image information. The imaging apparatus moves an image sensor to a plurality of sensor positions in the optical axis direction of an imaging lens, and focuses a subject at each of the plurality of sensor positions. Image data of the subject focused at each of the plurality of sensor positions is acquired, and the image data is analyzed to calculate an image evaluation value at each of the plurality of sensor positions.

Imaging apparatus, imaging method, and program

A variable magnification optical system consists of, in order from an object side, a first optical system remaining stationary during changing magnification and a second optical system including a plurality of lens groups moving during changing magnification. The first optical system includes a first mirror and a second mirror having reflective surfaces arranged to face each other. The first mirror is an optical element having a power at a position closest to the object side on an optical path and has a reflective surface concave toward the object side. The second mirror has a reflective surface convex toward the image side. An intermediate image is formed between the second mirror and the second optical system.

Variable magnification optical system and imaging apparatus

A finder display unit displays a live view image based on a captured image generated by an imaging unit. A digital signal processing unit detects a movement vector between frames in the live view image for a predetermined portion in the captured image. A digital signal processing unit changes a display range of the live view image on the finder display unit based on the detected movement vector of a peripheral portion in the captured image.

Imaging apparatus, and control method and control program therefor

There are provided a lens, a zoom lens, and an imaging lens capable of eliminating blurriness of a ring zone without reducing resolution and increasing the number of steps of processing. A lenshas random unevenness within an optical effective diameter D of an optical surface, an arithmetic mean roughness Ra within the optical effective diameter D of the optical surfaceis 20 nm or more and 50 nm or less, and an average value of widths W of protrusion portionsof the unevenness on an average line Cof a roughness curve Cof the optical surfaceis 1/200 or more and 1/50 or less of the optical effective diameter D of the optical surface. The lensis suitably used as a lens that composes a zoom lens or an imaging lens.

The variable magnification optical system includes, in order from an object side, a positive first lens group disposed at a position closest to the object side, a variable magnification lens group which is disposed at a position closest to the object side among negative lens groups and moves during changing magnification, an intermediate group including at least one lens group, and a positive final lens group which is disposed at a position closest to the image side. The variable magnification lens group, the intermediate group, and the final lens group are continuously disposed. The variable magnification optical system includes at least one LA lens. This LA lens satisfies predetermined conditional expressions relating to a refractive index, an Abbe number, and a partial dispersion ratio, and is located from the variable magnification lens group to the intermediate group.

Variable magnification optical system and optical apparatus

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Saitama-ken, Japan

Michio Cho