Dig Camera

[John McGregor]

<snip>
> As for
> shutter speed, as long as my camera told me it would
> use a shutter speed of 1/60 sec. or faster I knew I
> would normally be blur free...
>   
A whole lot depends on the size and type of shutter employed and the
inertia created as the shutter opens and closes. Electronic leaf
shutters, where every step from initial opening to the final close is
tightly controlled and dampened, produce minimal to no shake. The
inertia in spring powered, mechanical leaf shutters produces some
vibration, but the worst offenders are the mechanical curtain style
shutters that were almost universal in SLRs for many years.

The other variable that comes into play is the photographer's ability to
control body movement relative to the duration of the shutter being
open. At 1/30 sec or longer, even the most insignificant movement will
be apparent in the image. At 1/60 sec more significant movement can
still mar an image. Except in extreme cases, 1/125 sec is fast enough to
freeze all action and render a completely static image. A fair part of
the population can remain completely still long enough to safely shoot
at 1/60 sec, but for the general population, 1/125 sec or shorter is the
rule of thumb for hand held camera photography.

John


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