At 06:10 PM 9/17/2002 -0700, Tim Chakravorty wrote:
...
Again , its important that for best quality you shoot from a sturdy
tripod. Here is an extract from John B. Williams's
'Image Clarity' pg 191.
"
....handholding is strictly for dead photographers: a human pulse
beat will cause 200 microns (about 0.008 inch) displacement for
1/10th second. Assuming a shutter speed of 1/250th sec., this
movement alone will cause a 220ss of resolution with a system
that
is otherwise capable of reproducing 100 lines-per-mm (lpm). And at
a shutter speed of 1/125th sec., this performance would degrade
to only 53 lpm-a 47% waste of what you purchased ....
...
Wow. I wonder how Galen Rowell got those incredibly sharp granite
wall shots hanging from a rope.
What you also purchased was a portable camera designed to be hand
held. If it were designed primarily to be supported by a tripod I
think it would look completely different. So the flip side is that if
you only used it supported you are wasting the hand held capability
that built into it.
--
Winsor Crosby
Long Beach, California
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