Very dark picture with built-in iSight

Hi,
with my 3 month old intel iMac it seems that the picture I get with the built-in iSight is much darker than with my previous white iMac G5 with built-in iSight.
My new iMac sits in the very same place as my previous iMac G5, yet the picture quality in terms of brightness is only mediocre.
Is there a way for me to adjust the settings for my iSight?
Has anybody else noticed this? Could it be a hardware problem?
Thank you,
Torsten

Have you closed and opened Photo Booth? This is often all that is required.
This also can help:
Open the iChat application>video preview. If it is dark as well select:
iChat>change my picture>take a snap shot. Close iChat and open Photo Booth.
I haven't found the sniper solution yet, it doesn't happen very often.

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Very dark picture with built-in iSight

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