EXIF参数看不出光圈。定焦头吧？
2.0的光圈加上1/30的快门400的ISO应该亮度还可以了。只是时间长容易模糊。后期的噪音怎么处理的？
Camera Maker: Canon
Camera Model: Canon EOS-1Ds Mark III
Image Date: 2012-12-24 18:23:02 +0000
Aperture: f/0.0
Exposure Time: 0.033 s (1/30)
ISO equiv: 400
Exposure Bias: -0.67 EV
Metering Mode: Matrix
Exposure: aperture priority (semi-auto)
White Balance: Auto
Flash Fired: No (enforced)
Orientation: Normal
Color Space: Adobe RGB (1998)
GPS Coordinate: undefined, undefined
Software: Adobe Photoshop CS5 Windows
