Point-and-shoot

Comparison to SLRs and DSLRs

Point-and-shoot cameras are distinguished from single-lens reflex cameras (SLRs) in several respects: point-and-shoot film cameras, and many digital ones, use a viewfinder. The image that the photographer sees is not the same image that passes through the primary lens of the camera. Rather, the image in the viewfinder passes through a separate lens. SLRs, on the other hand, have only one lens, and a mirror diverts the image from the lens into the viewfinder; that mirror then retracts when the picture is taken so that the image can be recorded on the film or sensor. With this mechanism, pictures cannot be previewed on the LCD screens of most digital SLRs (DSLRs). Some manufacturers have found a way around this limitation, often by splitting the image into two just before reaching the viewfinder eyepiece. One image goes into the viewfinder and the other goes into a low resolution image sensor to allow light metering or previewing on the LCD, or both.