Correcting Trapezoidal Distortion At Oblique Shooting - NEC DV11G User Manual

Correcting Trapezoidal Distortion at Oblique Shooting

The trapezoidal correction function can be used to correct trapezoidal distortion that occurs when the camera arm
is moved from the normal position (60°) to a higher position (80°) and material is shot from an oblieque direc-
tion.
The wider base is adjusted to the narrower base to obtain an image with reduced distortion.
Use this function when showing a material of A4 vertical size within a screen or when avoiding the reflection of
external light or light from the main light on the material to be shot.
60° (normal position)
The indicator of the 'ON/OFF' button of KEYSTONE lights up
when the trapezoidal correction function is working. To turn off
the trapezoidal correction function, press the 'ON/OFF' button
(indicator going out).
If the trapezoidal correction function has not corrected distortion
completely, make fine adjustment with '+' / '-'button of
KEYSTONE.
NOTE:
• The trapezoidal correction function does not work when the camera arm is lower than the normal position and mate-
rial is shot from an oblique direction.
• Turn off the trapezoidal correction function when shooting a solid body from an oblique direction.
• If you adjust the input signal using an auto adjusting function of a projector or display during the operation of the
trapezoidal correction function, the image may not sometimes be displayed properly when the camera arm is returned
to the normal position. In such a case, please carry out the automatic adjustment again.
During the use of trapezoidal correction function:
• Image width narrows.
• Image quality may sometimes drop.
• Magnification of optical zooming lowers.
• Focusing sometimes fails.
BRIGHTNESS
AUTO
AUTO
E-16
Indicator
KEYSTONE
DARK BRIGHT ON/OFF
FOCUS
ZOOM
NEAR FAR WIDE TELE
REAL/FREEZE