Sony SLT-A57 &alpha Handbook page 133

Compensating for the brightness and contrast automatically (D-Range)
• When the contrast of the scene is low or when camera shake or subject blur is
occurred, you may not obtain good HDR images. If the camera has detected a
problem, is indicated on the recorded image to inform you of this situation.
Shoot again, as necessary, paying attention to the contrast or blur.
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