Nikon D90 - Manual (Page 223)

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Clean Image Sensor
Select this option to remove dust from the image sensor or to choose options for
automatic image sensor cleaning (pg. 244).
Lock Mirror up for Cleaning
Lock the mirror in the up position to allow inspection or manual cleaning of the low-
pass filter that protects the camera image sensor (pg. 246).
Video Mode
When connecting the camera to a television or VCR via the video connector, be sure
the camera video mode matches the device video standard (NTSC or PAL).
HDMI
The camera is equipped with an HDMI (High-Definition Multimedia Interface)
connector, allowing pictures to be played back on high-definition televisions or
monitors using a type C cable (available separately from commercial suppliers).
Before connecting the camera to high-definition device, choose the HDMI format
from the options below.
The camera monitor turns off automatically when an HDMI device is connected.
Option Description
v Auto (default) The camera automatically selects the appropriate format.
J 480p (progressive) 640 × 480 (progressive) format
K 576p (progressive) 720 × 576 (progressive) format
L 720p (progressive) 1,280 × 720 (progressive) format
M 1080i (interlaced)
1,920 × 1,080 (interlaced) format