[robski]

Hi Dazza

Brightness is controlled by exposure.

Exposure is the combination of ISO setting, Shutter speed and Aperture f-stop.

It would suggest if your images are coming out too dark then the camera should indicate that shot will under expose.

Reducing the shutter speed will also increase the exposure (brightness). The Downside of upping ISO setting is the grain effect (noise) will also increase.

I suggest you read this thread

http://worldphotographyforum.com/showthread.php?t=125

and ask any questions on any points you don't fully understand.

It maybe you need to apply some exposure compensation which is another topic.