Sony a (alpha) DSLR-A100 Operating Instructions Manual page 129

The image is out of focus.
The subject is too close. Check the minimum focal distance of the lens.
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• You are shooting in manual focus mode, set the focus mode switch to AF (page 71).
You try to shoot a subject that may require special focusing (page 15). Use the focus-lock or
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manual focus function (page 71).
The flash does not work.
The built-in flash is closed. Pull it up.
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The flash mode is set to [Autoflash]. If you want to make sure the flash fires without fail, set
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the flash mode to [Fill-flash] (page 54).
Fuzzy specks appear in images shot using the flash.
Dust in the air reflected the flash light and appeared in the image. This is not a malfunction.
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A picture taken with the flash is too dark.
If the subject is beyond the flash range (the distance that the flash can reach), the pictures will
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be dark because the flash light does not reach the subject. If the ISO is changed, the flash
range also changes with it (page 44).
The bottom of a picture taken with the flash is too dark.
The picture was taken with the lens hood on. Remove the lens hood when the built-in flash is
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used. With some lenses, the bottom of the picture may become dark even without the lens
hood ( step 5 in "Read This First").
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The flash takes too long to recharge.
The flash has been fired in succession in a short period. When the flash has been fired in
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succession, the recharging process may take longer than usual to avoid overheating of the
camera.
The date and time are recorded incorrectly.
Set the correct date and time (page 99,
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The aperture value and/or shutter speed flash when you press the shutter
button halfway down.
Since the subject is too bright or too dark, it is beyond the available range. Adjust the setting
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again.
The image is too dark.
You are shooting a subject with a light source behind the subject. Select the metering mode
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(page 58) or adjust the exposure (pages 37, 65).
• The brightness of the screen is too low. Adjust the brightness of the LCD monitor (page 98).
step 3 in "Read This First").
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