HP M527 - Manual (Page 19)

ISO speed
This setting adjusts the sensitivity of the camera to light. When ISO Speed is set to the
default Auto setting, the camera selects the best ISO speed for the scene.
Lower ISO speeds capture images with the least amount of grain (or noise), but result in
slower shutter speeds. If taking a picture in low light conditions without a flash at ISO
100, use a tripod.
Higher ISO numbers allow faster shutter speeds, and can be used when taking pictures
in dark areas without a flash, or when taking pictures of fast moving objects. Higher ISO
speeds produce pictures with more grain (or noise) and, therefore, can be of lower quality.
HP Photosmart M527 Digital Camera 19