Magnified Close-Up Shooting - Canon PowerShot SD850 IS Digital ELPH User Manual

You can shoot a subject 2 - 50 cm (0.8 in. - 1.6 ft.) from the end of
the lens at the maximum wide angle setting. With the digital zoom,
the image area is 7.5 x 5.5 mm (0.3 x 0.2 in.) at maximum zoom
(approximately 4.0x).
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