Sony SLT-A37 - Manual (Page 98)

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Selecting the shooting mode
• Use a tripod.
• Set the focus to infinity in manual focus mode when shooting fireworks,
etc. When the infinity position of the lens is not known, first adjust the
focus on fireworks that is set off in the same general area, then shoot
them.
2
Rotate the control dial to the left
until [BULB] is indicated.
BULB
3
While pressing the AV button,
rotate the control dial to adjust
the aperture (F-number).
AV button
4
Press the shutter button halfway down to adjust the focus.
5
Press and hold the shutter button for the duration of the
shooting.
As long as the shutter button is pressed, the shutter remains open.
Shooting techniques