Sony DSLR-A700 - Manual (Page 103)

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For details on the operation 1 page 32
Long exposure makes noise conspicuous. When the shutter speed is one second or slower,
noise reduction is activated to reduce the grainy noise that is common in long exposures.
• Noise reduction is not performed on continuous shooting or continuous bracketing even when it is set to
[On].
When the camera sensitivity is set high, noise in the pictures tends to become more noticeable.
When the ISO is set to 1600 or above, High ISO noise reduction is automatically activated to
lower the noise.
• When [High] is selected, the speed of continuous shooting becomes approx. 3.5 images/sec.
Long exp.NR
On When a long exposure of one second or longer takes place,
the noise reduction process is performed for the duration that
the shutter was open. While the noise reduction is being
performed, the message “Processing...” appears on the LCD
monitor. You cannot take the next picture until the process is
over.
Off This mode does not perform noise reduction. This is suitable
when timing of shooting takes precedence. However, this
makes the noise more conspicuous. It is recommended that
you activate the noise reduction if you use long exposure.
High ISO NR
High High ISO noise reduction is high.
Normal High ISO noise reduction is normal.
Low High ISO noise reduction is low.