Nikon D40 - Manual (Page 121)

Technical Notes/Troubleshooting 109
Problem Solution
Image in viewfinder is not in focus.
• Manual focus selected: if AF-S or AF-I lens is attached,
choose autofocus mode. Otherwise focus manually.
• Camera unable to focus using autofocus: use manual
focus or focus lock.
• Lens is not AF-S or AF-I: use manual focus.
28, 97
26, 28
28, 97
AF-assist illuminator does not light.
• Mode dial rotated to or : select another mode.
• AF-assist lamp does not light for manual focus or
continuous-servo autofocus. Choose AF-S.
• Choose On for Custom Setting 9 (AF-assist).
• Illuminator has turned off automatically. Illuminator
may become hot with continued use; wait for lamp
to cool down.
4, 18–19
23
76
—
Shutter release is disabled.
• Memory card is full, locked, or not inserted.
• Flash is charging.
• Camera is not in focus.
• CPU lens with aperture ring attached without lock-
ing aperture at highest f/-number.
• Non-CPU lens is attached: rotate camera mode dial
to M.
• Mode dial rotated to S after shutter speed of bulb
selected in mode M: choose new shutter speed.
12, 13,
15
17
23
8, 39
39, 43,
45
41, 43
No photo taken when remote con-
trol shutter-release button is
pressed.
• Replace battery in remote control.
• Choose remote control mode.
• Flash is charging.
• Time selected for Custom Setting 17 (Remote on
duration) has passed: reselect remote control
mode.
• Bright light is interfering with remote.
103
33
17
79
—
Only one shot taken each time shut-
ter-release button is pressed in con-
tinuous shooting mode.
Continuous shooting is not available when flash is
raised. 32, 34,
36
Camera is slow to record photos. Turn noise reduction off. 73
Date of recording is not correct. Set camera clock. 11
Final photo is larger than area
shown in viewfinder. Viewfinder horizontal and vertical frame coverage is
approximately 95%.
—
Randomly-spaced bright pixels
(“noise”) appears in photographs. • Lower ISO sensitivity or use noise reduction.
• Shutter speed is slower than 1s: use noise reduction. 37, 73
73
Reddish areas appear in photos.
Reddish areas may appear in long time-exposures.
Turn noise reduction on when shooting at shutter
speeds of “bulb” or “--”.
44, 73
Colors are unnatural
• Select mode P, S, A, or M and adjust white balance to
match light source.
• Select mode P, S, A, or M and adjust Optimize image
settings.
39, 49
39, 68