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准确的曝光是指闪光灯与被摄物体在某一个距离上使主体得到合适的曝光。短于这一距离,曝光过度。长于这一距离,曝光不足。这一距离参数取决于以下四个方面。一,闪光灯的指数及闪光灯输出量。指数越大作用距离越大。如果在闪光灯上选了TTL及A则它根据物体的反射及相机的设置确定输出闪光量。另外闪光灯是直射物体还是向天花板打的漫射光、是否有滤光片等等都影响作用距离。二、与相机的感光度有关,感光度越高,作用距离越大。三、光圈。光圈越大,作用距离越大。与相机的速度无关(速度不能高于最高同步速度,最高同度速度一般为1/125,有的相机在使用闪光灯时强制快门速度为1/60)对于你的这一问题,由于不知道你的闪光灯设置是否为M,主体与闪光灯的距离不知多少,感光度不知多少,没法确定光圈值。对于单反机,闪光灯的使用技巧比较多,不仅仅是闪一下光。想信你通过几次实践能熟练掌握闪光灯的使用方法。熟能生巧。切记不能用闪光灯直射幼儿进行拍照,伤眼睛!
如果进行室内拍摄的部分,一般来说还是有闪光灯会比较好。因为室内拍摄时光线不足,特别容易导致快门速度不够,如果没有闪光灯的话,就只能使用大光圈再配合提高iso的方法了。你5d2的套机镜头一般为24-105 f4.拍摄时可以使用av档,多使用f4的光圈,iso可以提高到1600左右,试试快门速度是否足够。
外置闪光灯: canon270EX。 闪光设置:前帘同步自动闪光模式拍摄环境:晚上全黑房间,拍摄距离3米,定拍。原片,未经任何处理。二、画面亮度对比: 前三幅照 不同的牌子设置也不一样
准确的曝光是指闪光灯与被摄物体在某一个距离上使主体得到合适的曝光。短于这一距离,曝光过度。长于这一距离,曝光不足。这一距离参数取决于以下四个方面。一,闪光灯的指数及闪光灯输出量。指数越大作用距离越大。如果在闪光灯上选了TTL及A则它根据物体的反射及相机的设置确定输出闪光量。另外闪光灯是直射物体还是向天花板打的漫射光、是否有滤光片等等都影响作用距离。二、与相机的感光度有关,感光度越高,作用距离越大。三、光圈。光圈越大,作用距离越大。与相机的速度无关(速度不能高于最高同步速度,最高同度速度一般为1/125,有的相机在使用闪光灯时强制快门速度为1/60)。canon 500D的智能系统均能自动调整相应的闪光输出级别,以获得标准曝光。外置闪光灯的闪光效果等同闪电,闪光强度远高于环境光,闪光速度远高于快门速度,相机的曝光程度完全由闪光灯的闪光输出级别决定。无论快门速度是1/125,1/60还是3.2秒,闪光灯并不可能根据快门速度设置进行持续的闪光。因此,相机的曝光在闪光灯闪光的瞬间就已完成,相机的有效曝光与快门速度基本无关。使用外置闪光灯进行拍摄,首先是按照闪光灯的指数来确定拍摄距离,然后再根据现场拍摄条件选择拍摄模式。如为定拍可采用光圈优先模式,适当缩小光圈提高成像质量(P4)。如为手持宜采用快门优先模式,设定稍高的快门速度,既可防止机振,也可避免闪光结束而快门尚未完全关闭时,环境光对成像的干扰。如场景复杂则选用全自动模式,平衡主体和背景的曝光。
您好,先用光圈优先,就是那个av模式,光圈调到6.3,拍一张试试看,然后再去手动模式相应调整呗。。。这样比较省事儿吧