Lock Mirror Up For Cleaning - Nikon D300 User Manual

Lock Mirror Up For Cleaning

(User's Manual – D300S page 361; D300 page 374)
Lock mirror up for cleaning is for those times when the
high-frequency vibration method of cleaning your D300(S)'s
sensor does not dislodge some stickier-than-normal dust. You
may have to clean your sensor more aggressively.
In many cases, all that's needed is a dust blower to remove
the dust with a puff of air. I remember having to do this with
my Nikon D100 in 2002, and I was always afraid I might ruin
the shutter if I did it incorrectly. With the D100, I had to hold
the shutter open in bulb mode with one hand while I blew off
the sensor with the other.
The D300(S) helps out by providing this Lock mirror up for
cleaning function so that you can more safely blow a stubborn
piece of dust off the low-pass filter. Using this function, you
can use both hands since battery power holds the reflex mirror
up and the shutter open.
Here are the three screens and steps you'll use to select this
mode for manual sensor cleaning:
Figure 5-8. Lock the mirror for cleaning screens
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