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减轻旅行负担 相机搭配怎样的镜头适合一镜走天下?******

    如今正值假期出游的好季节,也特别适合出去旅游。而对于旅行拍照这件事,相信有不少人往往会将自己所有的摄影装备全部塞进背包里,无论它们会不会在旅行过程中用得上。然而殊不知过重的背包会让你的旅行体验大打折扣,因此,想要更好的旅行拍照体验,必须要学会给自己的背包“减负”。所以对于绝大部分人来说,没有什么比轻松自在更重要吧,所以如果你不是专业摄影师,但又想在拍出好照片的同时还省力,那么为你的相机选择一支适合“一镜走天下”的镜头绝对是个不错的选择。

    那么问题来了,旅行摄影究竟应该带什么镜头? 

    镜到用时方恨少!难得去旅摄,干脆把家中的长短镜头甚至是大炮都放进相机包中,免得镜到用时方恨少,但最后发现还是大部分都用不上;可能也会有朋友说,想要轻松那就直接定焦头不就行了?而且定焦头画质还更高。话虽如此,定焦镜头影像质素比一般变焦为好,必定可以拍到优质的照片,但旅行期间只利用个别焦距的定焦镜头, 或者未必能拍摄到自己想要的场景与题材。

    综合来看,我认为最合适旅行拍照的镜头一方面要满足广角拍摄的需求,一些大场景的风光以及建筑等都适合用广角来拍摄。其次,长焦也不可少,拍摄远景、人像以及一些特写都需要更长的焦段来突出主体。最后,镜头的尺寸还不能太大,因为毕竟就是冲着轻便去选择的。那么针对这些要求,其实一支可靠的大变焦镜头最为合适,并且各家厂商对于这样的拍摄需求也都有推出不少优质的镜头,比如富士新发布不久的XF16-80mmF4 R OIS WR,即覆盖了广角与长焦同时还具备恒定光圈,是一支非常典型的适合一镜走天下的旅游头。

恒定光圈大变焦旅游头:富士XF 16-80mm F4 R OIS WR

    这枚富士XF 16-80mm F4 R OIS WR镜头适用于富士X系列APS-C画幅无反相机,达到5倍光学变焦,具备光学防抖机构支持6档光学防抖性能,在16-80mm焦距范围内都拥有最大F4的光圈值(相当于35mm焦距24-122mm)。对于户外拍摄,镜头还支持防尘防滴溅,可在零下10度的温度中工作,这对于旅行拍摄也非常重要。

    在光学结构上,XF 16-80mm F4 R OIS WR采用12组16片镜头结构设计,其中包含三组非球面镜片,以及一片非球面ED镜片,可有效控制球面像差和畸变。同时,使用非球面ED镜片作为OIS防抖镜头,可以抑制图像防抖带来的像差波动,具有强大的OIS光学防抖性能,当相机固定到三脚架或平移时会自动进行检测,并做出相应调整。除了其出色的操作性能,XF 16-80mm F4 R OIS WR小巧的体积也是一大亮点,镜头重量仅440g,总长度为88.9mm,比全画幅系统同类5倍变焦镜头轻40%,旅行拍摄时携带起来更加方便。

多功能旅行镜头:佳能RF 24-240mm F4-6.3 IS USM

    佳能近年来一直都在大力发展旗下EOS R全画幅微单系统,而新发布的RF 24-240mm F4-6.3 IS USM镜头是佳能专微RF卡口的第6支镜头,走的是一镜走天下的全画幅多功能旅行镜头路线。镜头达到10倍光学变焦可以拍摄风光、建筑,也方便记录日常生活以及兼顾人像拍摄。此次佳能RF24-240mm F4-6.3 IS USM镜头采用轻量化设计,外观设计简洁紧凑,焦段范围覆盖从24mm至240mm。而且得益于EOS R系统大口径卡口和短后对焦距离的设计优势,作为一支拥有10倍光学变焦能力的RF24-240mm F4-6.3 IS USM镜头在整个焦段的高水准光学表现。


    在光学设计上,佳能RF24-240mm F4-6.3 IS USM采用15组21片结构,其中配备一枚1枚非球面镜片、2枚UD(超低色散)镜片。0.5 m (广角端)/0.78 m(远摄端)的最近对焦距离,可拍摄旅行中的美食或小巧的纪念品的近摄照片。RF24-240mm F4-6.3 IS USM镜头采用7片光圈叶片,该镜头滤镜规格为72mm,最小镜头整体长度约122.5mm,最大直径约80.4mm,重量约750g。在镜头操控上,RF24-240mm F4-6.3 IS USM的对焦环与控制环采用二为一的设计,可自由切换功能设置。另外,在作为对焦环时为无极转动,并没有段落感,因此可进行平滑的对焦和曝光控制操作。在作为控制环功能时,可进行曝光补偿、感光度数值、光圈或快门速度等常用拍摄参数的快捷设定及调整。

全画幅微单的好选择:索尼FE 24-240mm F3.5-6.3 OSS

    索尼FE 24-240mm F3.5-6.3 OSS镜头提供了相比市场上常见的全画幅大倍率变焦镜头28mm焦距更短的24mm焦距,具备了更高的实用性的同时,拍摄者可以凭借这款镜头拍摄出透视感和冲击力比较强烈的照片。这款镜头也是目前索尼FE卡口全画幅镜头群中唯一的大变焦倍率的镜头,规格上面可以说是独一无二的。

    该镜头采用了12组17片的光学结构,其中包含多达5片非球面镜片和1片ED低色散镜片的特殊镜片。这款镜头采用了7片圆形光学叶片 设计,浮动光圈的设计令其具备了F3.5-6.3的最大光圈,而最小光圈则为F22-40。除了浮动的最大光圈值外,这款镜头的最近对焦距离也会随着焦距 在0.5-0.8米之间变化。

副厂首选最佳旅游头:腾龙16-300mm F/3.5-6.3 Di II VC PZD MACRO

    腾龙16-300mm F/3.5-6.3 Di II VC PZD MACRO镜头覆盖16mm(相当于35mm全画幅相机24.8mm)到300mm(相当于35mm全画幅相机465mm)的超大变焦范围,在广角端时能将宏伟风景尽收其中,而在长焦端时可捕捉到远距离拍摄对象具有震撼力的特写画面,还具有1:2.9的微距对焦功能。由12组16枚镜片组成,使用了3枚玻璃铸造非球面镜片、2枚LD低色散镜片和1枚UXR超高折射率镜片。

    腾龙16-300mm采用了复合镀膜技术,最大限度抑制眩光和鬼影,确保清晰锐利图像。而先进的机械设计工艺的运用,使其仍然保有令人惊叹的紧凑轻便外形。腾龙独有的VC (Vibration Compensation)防抖技术,采用3组驱动线圈,通过3个陶瓷球以电磁驱动方式控制补偿镜片(VC镜片),由于VC镜片仅与陶瓷球接触,摩擦更小更平稳。


    旅行拍摄并不只是仅仅只有摄影这么简单,还有旅行经历。摄影作品是给人看,而旅行经历是留给自己的珍贵回忆,虽然有了便利的拍摄设备,但还是要享受旅行才行。

NE China province aims to become world******

CHANGCHUN, Oct. 29 (Xinhua) -- Northeast China's Jilin Province, located in the world's golden latitude of ice and snow similar to the Alps, has unveiled a blueprint to make itself into a world-class skiing hub as winter sports are gaining steam due to the upcoming 2022 Beijing Winter Olympics.

The development plan of the ice and snow industry released by the provincial government on Thursday puts forward a phased target involving the major tasks and measures for the 2021-2035 period.

Jilin will strive to become an international ice-snow tourism destination with an industry scale of more than 250 billion yuan (around 39.08 billion U.S. dollars), attracting over 300 million winter sports enthusiasts by 2025, according to the plan.

The number of ski resorts in Jilin is expected to reach 100 by 2025 with the industry scale of ice and snow sports reaching 24 billion yuan, the plan stated, adding that by 2035, the province would become China's highland of high-quality ice and snow industry.

Jilin currently has 46 ski resorts with the total length and area of ski slopes reaching 298 km and 1,032 hectares, respectively. It ranks first among all provincial-level regions in China in terms of the area of ski slopes.

The province currently boasts 302 national-level ice and snow sports training institutions serving athletes slated to take part in the Beijing 2022 Winter Olympics. Enditem

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Trade between China's Guizhou, RCEP member countries up 16.6 pct in Q1******

GUIYANG, Nov. 6 (Xinhua) -- Trade between southwest China's Guizhou Province and the Regional Comprehensive Economic Partnership (RCEP) member countries grew by 16.6 percent year on year to about 12.17 billion yuan (about 1.9 billion U.S. dollars) in the first three quarters of this year, said Guiyang customs.。

Exports mainly include fertilizer, tires, tea, guitars and main imports are metal minerals and rubber, the customs said.。

Data also showed that the trade between Guizhou and RCEP member countries has accounted for about 30 percent of the province's total foreign trade.。

The Regional Comprehensive Economic Partnership (RCEP) agreement, which will take effect on Jan. 1, 2022, is the world's largest free trade agreement, covering about 30 percent of the world's population. Enditem。

双语热点:青少年,别再熬夜啦!睡得少,一年多吃两公斤糖!******

睡眠质量对每个人尤为重要,但对青少年特别是在关键! 之前的科学研究通常仅仅将睡眠不足与身心健康不给力、学业成绩不佳和个人行为问题的风险性提升联络起來。但全新研究表明,睡眠不足也会提升青少年增重和别的心血管新陈代谢病症的风险性,由于青少年睡眠不足时饮食结构也会越来越更差。

Teens not getting enough sleep may consume 4.5 extra pounds of sugar during a school year。

Sleep is vital for all people but is particularly important for teenagers as their bodies undergo significant development during their formative years. Unfortunately, most teens aren't getting enough sleep. Data from the American Academy of Pediatrics found that 73% of high school students are getting less than the recommended eight to ten hours of sleep each night.。

睡眠质量对每个人尤为重要,但对青少年特别是在关键,由于她们正处在人体快速生长发育的历程中。但实际上,大部分青少年都睡眠不足。英国儿科护理学会的数据信息强调,73% 的高中学生每天晚上睡觉时间低于强烈推荐的 8 到 10 钟头。

Prior research has linked lack of sleep to increased risk for poor mental health, poor academic performance, and behavioral problems. But new research from BYU conducted at Cincinnati Children's Hospital Medical Center says insufficient sleep also increases the risk of weight gain and other cardiometabolic diseases among teenagers because teens have worse dietary habits when they sleep less.。

之前的科学研究通常仅仅将睡眠不足与身心健康不给力、学业成绩不佳和个人行为问题的风险性提升联络起來。但杨百翰大学在辛辛那提儿科医院研究中心开展的全新研究表明,睡眠不足也会提升青少年增重和别的心血管新陈代谢病症的风险性,由于青少年睡眠不足时饮食结构也会越来越更差。

"Shortened sleep increases the risk for teens to eat more carbs and added sugars and drink more sugar-sweetened beverages than when they are getting a healthy amount of sleep," said Dr. Kara Duraccio, BYU clinical and developmental psychology professor and lead author of the study.。

“睡觉时间减少会提升青少年摄入大量糖类与碳水化合物和加上糖及其食用大量含糖饮料的风险性,”杨百翰大学临床医学和发展心理学专家教授、该科学研究的关键参加者 Kara Duraccio 博士说。

This research, which was recently published in the medical journal SLEEP, analyzed the sleeping and eating patterns of 93 teenagers during two sleep conditions: spending six and a half hours each night in bed for one week (short sleep) and spending nine and a half hours each night in bed for another week (healthy sleep). Researchers measured the caloric intake, macronutrient content, food types, and the glycemic load of foods eaten by teens.。

此项近期发布在学术期刊《睡眠》上的探讨剖析了 93 名青少年在二种睡觉时间下的睡眠质量和饮食搭配方式:每日只睡6个半小时,不断一周(睡眠时间短),随后下一周睡觉时间调节为9个半小时(健康睡眠)。科学研究工作人员对这种青少年所吃食物热量摄入、变量定义营养元素成分、食材种类和血糖值负载开展了检测。

The results found that teenagers undergoing short sleep consumed more foods that were likely to spike blood sugar fast—things like foods high in carbs and added sugar, or sugary drinks, compared to when they were in healthy sleep. These changes largely occurred in the late evening (after 9:00 pm). Teens getting short sleep also ate fewer fruits and vegetables across the entire day, compared to healthy sleep.。

結果发觉,与健康睡眠时对比,青少年在睡眠时间短的阶段摄入了大量很有可能使血糖值迅速上升的食材,例如高碳水化合物和加上糖的食材或含糖饮料。这种转变关键出现在深更半夜(夜里 9:00 以后)。与健康睡眠时对比,这种青少年在睡眠时间短时24小时摄入的水果和蔬菜也越来越少。

"What's interesting is that getting less sleep didn't cause teens to eat more than their peers getting healthy sleep; both groups consumed roughly the same amounts of calories of food. But getting less sleep caused teens to eat more junk," said Duraccio. "We suspect that tired teens are looking for quick bursts of energy to keep them going until they can go to bed, so they're seeking out foods that are high in carbs and added sugars."。

“有意思的是,与健康睡眠的同年龄人对比,睡眠不足并不会造成青少年吃得大量;2组耗费食物热量基本相同。但睡眠不足会造成青少年吃大量的油炸食品,”Duraccio 博士说。 “大家猜疑睡眠质量较少的青少年常常必须迅速填补动能为此来保持活力,因此她们已经找寻含有糖类与碳水化合物和加上糖的食材。”。

The research found that teens in short sleep consumed 12 extra grams of sugar each day. With most teenagers not getting sufficient sleep during the 180 nights of a school year, an extra 12 grams of added sugar each day could result in over 4.5 pounds of extra sugar each year.。

研究发现,睡眠时间短的青少年每日会附加摄入12克的糖。依照学员一年在学校期内180来天测算,这种睡眠不足的日子很有可能造成每一年附加摄入 4.5 磅糖。

"We know that pediatric obesity is an epidemic, and we've focused on a lot of interventions to try and address it, but sleep is not one of the things that researchers tend to focus on," said Duraccio. "If we are really trying to discover preventative strategies or interventions to increase optimal weight in teens, getting enough and well-timed sleep should be at the forefront of our efforts."。

“我们知道,儿童肥胖症早已变成一种愈来愈普遍的传染病,大家早已采用很多干涉对策来试着处理它,但大家对睡眠质量并并不是太关心,”Duraccio 博士说。 “如果我们确实想寻找让青少年维持健康体重的对策,那麼最先要让她们有着充足的睡眠時间。”。

第二届“智能化战争”研讨会在京举行

1.北京近4日有37例确诊病例来自集中隔离点

2.时代少年团宋亚轩张真源逛街被偶遇 两人低调惬意

3.中国电信:三年内与中国联通完成4G一张网整合

4.退役军人事务部协同社会力量关爱老兵

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