What type of shutter is commonly found in a single lens reflex camera?

A focal plane shutter is the type of shutter commonly found in single lens reflex (SLR) cameras. This shutter is located just in front of the camera's image sensor and operates by allowing light to hit the sensor for a predetermined amount of time, which is controlled by the camera's settings. The focal plane shutter consists of two curtains that move across the frame, with one curtain closing after the exposure time has started and the second curtain following to stop the exposure. This design is effective for high-speed photography as it allows for faster shutter speeds and helps minimize motion blur while providing a broader range of exposure options.

The focal plane shutter's construction and function make it a great choice for SLR cameras, facilitating quick and accurate exposures, even in dynamic shooting conditions. In contrast, leaf shutters operate differently and are usually found in medium format cameras and some compact cameras, while global shutters are primarily used in video cameras and specialized digital sensors to eliminate rolling shutter effects. A shutterless design is not typical for SLRs, as these cameras require a reliable shutter mechanism to capture images effectively.