Canon PowerShot A 640 User Manual page 158

120
Using the Lenses (Sold Separately)
The camera supports use of the separately sold Wide Converter
WC-DC58N and Tele-converter TC-DC58N. In order to attach
these lenses, you also need to use the separately sold Conversion
Lens Adapter LA-DC58F.
• When attaching the wide converter or tele-converter be sure
to screw it on securely. If they come loose, they may fall from
the lens adapter, posing risk of injury from shattered glass.
• Never look into the sun or into strong light through the lens,
wide converter or tele-converter as this can result in
blindness or impairment of vision .
• If
you use the flash when shooting with these attachments,
the outer area of the recorded image (especially lower right
corner) will come out relatively dark.
• When using the tele-converter, please set the focal length
to the telephoto end. At other zoom settings, the image will
appear as if its corners have been cut off.
• When using the wide converter, please set the camera to
the wide angle end.
• If you use the viewfinder for shooting, a portion of the view will
be blocked by these attachments. Please use the LCD monitor.
• Wide Converter WC-DC58N
Use this converter for taking wide-angle shots. The wide converter
changes the focal length of the camera body's lens by a factor of
O.7x (the thread diameter is 58 mm) .
• Tele-converter TC-DC58N
This lens is used for taking telephoto shots. The lens changes the
focal length of the camera body's lens by a factor of 1.75x (the
thread diameter is 58 mm).
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It is not possible to attach a lens hood or filter to the wide
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converter or tele-converter.