Nikon D300 Complete Manual page 557

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shutter about one second

camera works normally [default]

mirror lifted one second before shutter opens

Recommendations:

1. Remember that exposure will be calculated before the

mirror goes up.

2. Likewise, flash exposures are calculated before the mirror

goes up, so you'll see a preflash on pressing the shutter

release, then the main flash one second later when the

shutter opens. For most subjects, that is probably okay,

but be careful of subjects that will be startled by the

preflash. Some people will blink in response to the

preflash and have their eyes closed at the main flash.

Some insects and animals will bolt on the preflash.

3. In general, I prefer this function to the M

function only when I'm handholding the camera and not

using a wired remote. The timed shutter lag also works

best for static subjects (some people and animals react to

hearing the mirror flip). I use M

a tripod, using a remote release, and trying to precisely

time the actual picture taking for a particular moment (e.g.

in macro shots trying to time when the wind stops

blowing the flower).

Previous Nikon bodies used a delay of 0.4s, which in extreme cases didn't quite

wait long enough for support system motion to dampen due to the mirror slap.

Thom Hogan's Complete Guide to the Nikon D300

later (the mirror is lowered after

when my camera is on

Troubleshooting