Underexposing is pretty much the same thing as using a higher ISO and
amplifying the signal from the sensor.
Shel Belinkoff wrote:
Hi,
ISO was 200. Shot was underexposed by a couple of stops.
Shel
[Original Message]
From: Rob Studdert
http://home.earthlink.net/~scbelinkoff/SB_0010.jpg
What causes the horizontal stripes on the subject's arm?
Camera: istD
That's banding, it's a sensor/electronics artifact. I can only assume
it's an
high ISO shot or alternately the shot has been heavily adjusted. It's a
rarity
that a problem like that would show up in a well exposed daylight shot.
The
only time I've seen the problem in my *ist D images is in a handful of
low
light high ISO images.
--
When you're worried or in doubt,
Run in circles, (scream and shout).
