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温州女店员持续盗转店内530余万 老板误认疫情亏损去年底才察觉******

据介绍,“暴富”的吴某用大量赃款美容、购买名牌服装,曾一个月花100万充值美容卡,警方在其住处还查获650余件衣物、73双鞋子、38个包。


巴黎圣母院得到消防人员抢救 著名玫瑰花窗被烧毁******

(原标题:巴黎圣母院得到消防人员抢救 但著名玫瑰花窗被烧毁)

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图集已浏览完毕重新浏览 这里4月迎风雪天 大雪纷飞交通受阻

这里4月迎风雪天 大雪纷飞交通受阻

美

美"第一千金"伊万卡赴埃塞悼念埃航遇难者

暴雨袭击印尼茂物引发泥石流 投票箱被损毁

暴雨袭击印尼茂物引发泥石流 投票箱被损毁

吉国杰本文来源:新京报 责任编辑:杨强_NN6027

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Countdown to Beijing 2022******

BEIJING, Oct. 22 (Xinhua) -- Dozens of villagers from Yanqing District, about 74 km away from downtown Beijing, gathered at a local indoor skiing resort for a three-hour daily practise - a routine that has been going on for more than five months.

They are members of the Haituo farmer ski team formed on July 11, 2017, and most of them were born in Zhangshanying Township, administered by Yanqing. Over the last four years, their commitment to popularizing winter sports has never wavered.

"There were only 18 members when we set up the team, but now the number has increased to nearly one hundred," said Lang Enge, a 32-year-old leader of the ski team. "It is my responsibility to lead this team to embark on a professional path in a long run."

Lang, though still young, has already become an "old captain" of the farmer ski team. "Our members used to be fruit farmers, second-hand car sellers and temporary workers, and I was a shepherd. It was the Winter Olympics that brought us together, so we should seize this opportunity," Lang said.

The name "Haituo" comes from the Haituo Mountain north of Zhangshanying Township in the Yanqing competition zone of Beijing 2022 Winter Olympic Games, which has changed the lives of local residents.

"We just played for fun on ice and snow before, but now we have undertaken professional ski training with just one goal - getting a national ski instructor and referee's certificate. The Winter Olympics will spur the development of winter sports, and we can lead the public to get more involved," Lang said.

Up to now, more than half the team members have obtained this certificate, and Lang also received his international ski instructor certificate. The team has voluntarily trained more than 12,000 people since 2017.

"From three years old to over fifty, our trainees come from all walks of life, and we endeavor to help them find joy on snow," Lang said.

In recent years, many schools in Yanqing have provided opportunities for students to experience winter sports five times a year - three on snow and two on ice. Lang and his team also introduce ski equipment and safety measures to students on campus. "We make them prepared for safe skiing," Lang added.

"Yanqing is one of the three competition zones of the Beijing 2022 Winter Olympics, and I hope to make my due contribution as a ski instructor born here. I will also try my best to lead more members of the Haituo farmer ski team to find employment on snow, enabling more people to enjoy winter sports, which is our mission and a great privilege," Lang said. Enditem

F1.2恒定光圈变焦镜头?尼康神级35******

    尼康Z卡口的镜后距较短,加上卡口较大,所以相对以往F卡口更容易制造超大光圈镜头,像NIKKOR Z 58mm F0.95 S Noct及NIKKOR Z 50mm F1.2 S便是代表作。然而,最近有消息指尼康将会继续挑战光学技术界限,并注册了两支令人惊讶的恒定大光圈变焦镜头35-50mm F1.2和50-70mm F1.2的专利,不知道两镜会否像NIKKOR Z 58mm F0.95 S Noct一样,较为偏向开拓专业拍片市场呢? 

    NIKKOR Z 35-50mm F1.2 和 NIKKOR Z 50-70mm F1.2变焦幅度不大,变焦范围分别只有15mm和20mm,可能会有人质疑为何尼康不索性直接申请35-70mm F1.2设计专利?尼康要将原来的35-70mm两倍变焦镜再分拆成两支镜头,是考虑到镜头的体积问题,因为从流出的专利文件中看到单是35-50mm F1.2的光学设计已经十分复杂,既要在整个变焦范围拥有能人所不能的F1.2大光圈,而且光学质素要有一定保证才可以匹配这支神级镜头。另外,官方的申请文件更提到 NIKKOR Z 35-50mm F1.2的长度可能有210mm,足以媲美NIKKOR Z 70-200mmF2.8 VR S,但因为NIKKOR 35-50mm F1.2拥有更大的入光量,相信镜头直径几乎肯定可以超越NIKKOR Z 58mm F0.95 S Noct的102mm。 

NIKKOR Z 35-50mm F1.2 设计专利 

    其实过去在市场上也有超低变焦倍率的恒定大光圈变焦镜头,像适马在2015年就曾经发布24-35mm F2 DG HSM|Art全画幅单反镜头,而近一点的就有松下和徕卡推出的M4/3系统Leica DG Vario Summilux 10-25mm F1.7 Asph. 和 Leica DG Vario Summilux25-50mm F1.7 Asph.,不过由于松下使用于M4/3感光元件,镜头的外型也不致于大得那么恐怖,除了可用于视频拍摄外,配合外型较大的M4/3机身也可以在拍照时使用。反之尼康是次的两支镜无论是属全画幅或是APS-C画幅都会属于庞然大物,制作成本应该比NIKKOR Z 58mm F0.95 S Noct更高,但是如果属针对专业拍片,以35-50mm F1.2和50-70mm F1.2的规格已经吸引到部分专业摄影师的注意,以快将推出的Z9旗舰无反相机强调长时间拍摄8K 30p视频能力,不难推测尼康研发部门会考虑将35-50mm F1.2和50-70mm F1.2放于更高阶的商业电影市场。 

NIKKOR Z 50-70mm F1.2 设计专利 

via:dcfever


蚊虫叮咬后竟然腹痛?这种情况及时就诊

1.欧联-C罗进球被吹 利马争议送点 曼联0-1皇家社会

2.空军飞行员换发21式飞行服,颜值和战斗力都高到爆表

3.消费者委员会

4.昨日0时至今日15时,北京增本土感染者10例

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