The SD10 digital SLR camera has a unique feature pertaining to its viewfinder. It allows the finder to show 130% of the picture area. This is very useful, as it enables you to see what is happening outside the picture area, allowing you to anticipate people or objects entering the picture. This can be especially desirable for action photography, like sports, etc. The active picture area is visible at normal brightness, while the peripheral areas are masked with neutral density, making it easy to differentiate the two.