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Superior Auto 295

5. The shutter opens again (allowing Live View to occur once again).
That’s right – ONE cycle of shutter-close-then-open. You don’t actually
hear the camera make any sound at all (other than closing the f/stop) until
the exposure ends. Much more efficient. I keep this on all the time.
The user manual does offer some obscure warnings about this feature,
though, which I really ought to explain. Some older lenses (and some
rd
modern 3 party lenses), especially if they have large maximum apertures
(where the f/stop blades have a further distance to travel when they close
down all the way), might not be able to close their f/stop blades quickly
enough to coincide with the beginning of the exposure. (In the old days the
mirror had to flip up and the shutter open and the f/stop blades had more
time to close). If this happens to you you’ll see occasional overexposed
images, especially at fast shutter speeds and on bright days. Turning this
feature off is the sure cure.

6.24 SUPERIOR AUTO

Menu Position MENU  5  Superior Auto

What it Does Controls two key behaviors when your camera is in Superior
Auto mode

Recommended Setting [it’s an intensely personal preference]
Constraints Only available when the exposure mode dial is set to Auto and
MENU  8  Auto Mode is set to Superior Auto

The two modes this feature controls are described below.