You change the shutter speed in shutter priority mode the same way as you did in manual mode: Rotate the command dial and look for the changing Numbers in the LCD status screen.

调整快门的方法和在手动模式时一样：转动指令盘并且查看LCD上的数字变化。

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Putting the dial on "s" tells your camera "I am deciding the shutter speed, you set the aperture for me."

将指令盘拨到“ S ”来告诉你的相机：我设定快门速度，而你来调整光圈。

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On the dial, the shutter speed Settings increased in two-fold increments, making it easy to use.

在拨号盘，快门速度设置增加了在两重增加，使它容易使用。

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The design is simple: it's just a plastic shell with a shutter button, a dial for controlling shutter speed and a hand grip -- the sort you'd normally find on a compact camera.

ENGADGET: Hands-on with Snappgrip, a case that turns your phone into a point-and-shoot

The diaphragm, shutter speed and menu can be changed quickly using the command dial.

ENGADGET: Sigma DP3 Merrill packs a Foveon X3 sensor and a fixed F2.8, 75mm-equivalent lens