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時間:2022-08-15 來源:本站 點擊:258次
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Del Potro offered Argentina Open wildcard******

BUENOS AIRES, Dec. 20 (Xinhua) -- Former world No. 3 Juan Martin del Potro has been offered a wildcard for the Argentina Open ATP 250 tournament in February, organizers said on Monday.。

But the 33-year-old's participation will hinge on whether he can successfully recover from the latest operation on his troublesome right knee.。

"If he is fit, one of the wildcards is for him," tournament director Martin Jaite told reporters on Monday. "It will be a decision for him to make when and if he feels that he is fit to play."

Del Potro has been sidelined since June 2019, when he suffered a fractured right patella for the second time in nine months during the Queen's ATP 500 tournament in London.。

He has since undergone four operations, the most recent of which took place in Chicago in March.。

The Argentina Open will be played from February 5 to 13 on the outdoor clay of the Buenos Aires Lawn Tennis Club.。

Tournament officials said Argentina's 13th-ranked Diego Schwartzman and Austrian world No. 15 Dominic Thiem had confirmed their participation in the event. Enditem。

续写辉煌 索尼FE 70******

    索尼(中国)有限公司正式发布了新一代全画幅远摄变焦G大师镜头FE 70-200mm F2.8 GM OSS II(型号名:SEL70200GM2)。作为第65支E卡口镜头,同时也是第15支G大师镜头,FE 70-200mm F2.8 GM OSS II继承了索尼G大师镜头标志性的优异分辨率和柔美的背景虚化效果,并且具备更安静、快速和精准的自动对焦性能。镜头更加轻巧便携,可在不同拍摄环境下提供更加出色灵活的操控性,提升照片和视频拍摄的自由度,让用户随心挥洒创意。

· 在70-200mm焦距下实现F2.8恒定光圈

·安静、快速和精准的自动对焦和连续自动跟踪性能

·优异的视频拍摄功能

·轻量化设计,较上一代减轻约29%的重量

·自动对焦速度提升约4倍*1,变焦时自动对焦跟踪性能提升约30%*1

·专业的操控性与可靠性

FE 70-200mm F2.8 GM OSS II

更进一步的优异性能

  FE 70-200mm F2.8 GM OSS II镜头可在整个变焦范围内,从画面中心到边缘呈现清晰锐利的影像, F2.8最大光圈下也可实现优异的画质。镜头采用了2枚非球面镜片,包括一枚表面精度为0.01微米的XA(超级非球面)镜片,使FE 70-200mm F2.8 GM OSS II可有效控制变焦时的像差变化,让整个成像区域具备出色的分辨率。

   FE 70-200mm F2.8 GM OSS II还采用了两枚ED(低色散)玻璃镜片和两枚Super ED(超低色散)玻璃镜片,以显著降低色差且防止出现伪色。FE 70-200mm F2.8 GM OSS II还包含了一枚首次在索尼E卡口镜头中出现的ED(低色散)非球面镜片,可抑制长焦镜头中常见的色差和球差问题。

    F2.8大光圈配合新开发的11片圆形光圈叶片单元,使得镜头拍摄的影像呈现出柔美的背景虚化效果。不仅如此,包含XA镜片在内的先进光学设计,能有效抑制“洋葱圈”效应,进一步增强柔美散焦效果。FE 70-200mm F2.8 GM OSS II还可提供出色的近摄性能。70mm处的最近对焦距离仅为0.4米,200mm 处为0.82米,最大放大倍率达0.3倍。此外,FE 70-200mm F2.8 GM OSS II可轻松搭配索尼高性能SEL14TC或SEL20TC增距镜*2, 将镜头的焦距最大扩展到 400mm*3,同时保持其G大师镜头的高质量影像。

    索尼第二代纳米AR镀膜可在镜头表面实现均匀的抗反射涂层,能有效避免在户外环境下出现的眩光和鬼影。同时,FE 70-200mm F2.8 GM OSS II 的光学设计可有效抑制内部反射,进一步提高影像的清晰度。

Alpha 7R IV+ FE 70-200mm F2.8 GM OSS II      F8  1/25s  ISO 100

Alpha 7R IV+ FE 70-200mm F2.8 GM OSS II      F2.8  1/640s  ISO 500

Alpha 7R IV+ FE 70-200mm F2.8 GM OSS II      F6.3  2s  ISO 400

Alpha 7R IV+ FE 70-200mm F2.8 GM OSS II      F11  1/40s  ISO 100

(视频截图)

Alpha 7S III+ FE 70-200mm F2.8 GM OSS II       F2.8  1/100s  ISO640

 

业内领先的自动对焦

    FE 70-200mm F2.8 GM OSS II镜头搭配具备先进对焦技术的索尼微单™机身,可发挥出更加出色的自动对焦效果。新镜头采用了四个具有高速和高推力的XD线性马达,可实现快速精准的自动对焦,相比上一代自动对焦速度提升约4倍*1,变焦时的焦点跟踪能力提升约30%*1。FE 70-200mm F2.8 GM OSS II 与索尼旗舰微单™Alpha 1 搭配使用时,能够实现约30张/秒的高速连拍*4,使用增距镜时,也可提供出色的自动跟踪对焦性能。在进行视频拍摄时,FE 70-200mm F2.8 GM OSS II 可提供平滑快速的自动对焦,在变焦时也能够可靠地锁定焦点并跟踪快速移动的对象,使用户可以放心地将自动对焦交给相机,从而专注于创作本身。

Alpha 1+ FE 70-200mm F2.8 GM OSS II       F2.8  1/4000s  ISO 200

专业的视频创作功能

    FE 70-200mm F2.8 GM OSS II 具有恒定F2.8光圈,出色的自动对焦性能,以及专业的操控性和可靠性,是视频创作的优选。新镜头可显著减少呼吸效应、变焦过程中的焦点偏移和光轴偏移,从而减少不必要的画面移动和视角变化。

    为了方便用户拍摄视频时的操控,FE 70-200mm F2.8 GM OSS II 具有独立的对焦环、变焦环和光圈控制环,可进行精确的手动操作,并且还具备无级光圈点按开关(CLICK ON/OFF)。此外,线性响应手动对焦功能可实现快速、灵敏和精确的手动对焦控制。配备的遮光罩设有一个开口,以方便使用圆形偏振镜或可变ND滤镜,从而提高创作的灵活性。

为专业摄影师而设计

    FE 70-200mm F2.8 GM OSS II采用轻量化设计,重量约为1,045克(不含三脚架卡口),相比上一代镜头轻约29%。不止更加轻巧,FE 70-200mm F2.8 GM OSS II平衡性更佳,镜头重心直接落在三脚架底座的上方,镜头前部不会产生沉重感。此外,镜头还采用了内变焦设计,以在变焦时保持重心不变。

    FE 70-200mm F2.8 GM OSS II 在设计时聆听了很多专业摄影师的心声,改进了对焦等功能以更好地满足摄影师的专业需求,如全时DMF、精准的线性响应手动对焦以及对焦范围切换拨杆。FE 70-200mm F2.8 GM OSS II还具备3个可自定义的对焦锁定按钮,按钮采用相距 90°设计,以便在水平或垂直方向以及其他角度拍摄时可轻松操控。

    FE 70-200mm F2.8 GM OSS II 具备无级光圈点按开关(CLICK ON/OFF)和光圈锁定开关,可实现快速、灵活的光圈控制。光圈环转动的“咔嗒”声可在拍摄照片时打开以提供操作反馈,或者在拍摄视频时关闭以实现平滑安静的光圈控制。此外,优化的变焦环阻尼可实现松紧适中的手感,而针对运动物体拍摄加入 MODE 3 影像稳定功能*5。

    FE 70-200mm F2.8 GM OSS II 的专业设计旨在户外拍摄环境中保持出色的可靠性。根据摄影师的反馈,镜头的防尘和防潮功能*6已达到FE 400mm F2.8 GM OSS和FE 600mm F4 GM OSS同级别。镜头前组镜片采用氟化物涂层,可减少镜头表面沾染灰尘、油污和其他污染物,同时也更容易擦去附着在镜头表面的指纹。

价格和上市时间

     索尼G大师镜头FE 70-200mm F2.8 GM OSS II将于2021年11月上旬上市销售,建议零售价为18,999元。

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Feature: Smart gyms enhance mass happiness in China******

GUIYANG, China, Nov. 17 (Xinhua) -- At around 7pm, You Zuming, 73, leaves home with a table tennis bat in hand. He is going to play ping-pong with neighbors in the smart gym located in the community where he lives.。

You, who lives in Guiyang City, capital of southwest China's Guizhou Province, is an out-and-out sports fan and enjoyed competing regularly in his youth. But as he aged, You gradually changed his exercise routine and became fond of playing table tennis.。

"I take part in this exercise almost every day," he said.。

Equipped with various exercise machines, the gym is the first one to provide a 24-hour service in Guizhou. It opened on July 10 last year.。

According to gym manager Chen Lei, they provide most of the equipment to the community residents free of charge, except for running and spinning machines, and have also hired several professional instructors to offer fitness courses, such as yoga and aerobics, to community residents at a lower price than commercial gyms.。

Chen said the annual card for this gym costs only 240 yuan (37.6 U.S. dollars) while the seasonal card costs 68 yuan. What's more, residents can also choose an annual family card for 480 yuan, which allows three family members to share it simultaneously.。

Wei Rong, who works at a bank, signed up for a seasonal card about two months ago and is planning to sign up for another annual one later. "I come here five times a week and exercise for about one hour each time, I usually run and spin," she said.。

At the start, Wei used to have sore muscles after exercising, but now she feels much better.。

"After workouts, citizens can access their physical tests and exercise data by scanning the QR code with their mobile phones, based on which they can make a more scientific exercise plan," Chen said.。

Data released by the General Administration of Sports of China shows that nearly 60 percent of people who take part in sport choose to exercise within 1km from where they live.。

In Chen's view, smart gyms meet the needs of those users. "About 500 residents in the community have signed up for memberships at our gym, most of which are annual cards, and about 50 of them come to exercise every day," he added.。

Smart gyms have popped up in other cities in China for several years, such as Beijing, and Chongqing in southwest China. In early 2021, at least two other intelligent fitness venues were newly opened to the public in Guiyang, thus making fitness more convenient for residents living there.。

In China, with the continuous improvement of living standards, physical exercise now plays a much more important role in people's daily lives.。

According to You and others, smart gyms not only provide them with sports venues, but also enrich their lives. "Doing exercise every day keeps me in good heath, ensures I can enjoy my life better and enhances my happiness, so why not?" You smiled. Enditem。

Ukraine sets up 12 humanitarian corridors in 4 regions******

Ukraine established 12 humanitarian corridors in four regions on Friday to allow civilians to leave the conflict-torn areas, the Ukrainian government-run Ukrinform news agency reported, citing Ukrainian Deputy Prime Minister Iryna Vereshchuk.

The humanitarian corridors were set up to evacuate people from some cities and towns in eastern Donetsk and Kharkiv, southern Zaporizhzhya and north-central Kiev, Vereshchuk said.

She added that the Ukrainian authorities also have organized supplies of food and water to civilians in several other regions across the country that were affected by the conflict with Russia.

吉祥航空执行特殊航班接回滞留三亚旅客

1.3690亿美元,美国史上最大气候法案获众议院通过

2.提前还房贷要收取"补偿",说好的条件不能说变就变

3.我,985毕业,期望工资3500

4.马拉西亚:我来曼联不是为了坐板凳,全队必须继续前进

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