Depth-Of-Field Preview; Lcd Panel Illumination - Canon EOS-3 Instructions Manual

14. Depth-of-field Preview

• Pressing the depth-of-field preview button also sets AE lock.
• The depth-of-field preview button does not function during AF operation.

15. LCD Panel Illumination

• Pressing any button while the LCD panel is illuminated prolongs the illumination.
• The illumination turns off at the start of a bulb exposure.
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The depth of field is the range of
acceptable focus in front of and behind
the point of focus. The depth of field
changes depending on the aperture.
Press the depth-of-field preview button
to stop down the aperture and preview
this range of acceptable focus.
The LCD panel can be illuminated.
The LCD panel illumination button
turns the illumination on (for 6 sec.)
and off. The LCD panel illumination
turns off 2 seconds after a picture is
taken.