Editing Single-lens reflex camera (section)

== Common features ==
[[File:Cut-away Minotla SLR IMG 0378.jpg|thumb|Cut-away of a [[Minolta XE]] film-based SLR]]
[[File:Cut-away Minotla SLR IMG 0377.jpg|thumb]]

Other features found on many SLR cameras include [[through-the-lens metering|through-the-lens (TTL) metering]] and sophisticated flash control referred to as "dedicated electronic flash". In a dedicated system, once the dedicated electronic flash is inserted into the camera's hot shoe and turned on, there is then communication between camera and flash. The camera's synchronization speed is set, along with the aperture. Many camera models measure the light that reflects off of the film plane, which controls the flash duration of the electronic flash. This is denoted [[Through-the-lens metering#Through the lens flash metering|TTL flash metering]].

Some electronic flash units can send out several short bursts of light to aid the autofocus system or for wireless communication with off-camera flash units. A pre-flash is often used to determine the amount of light that is reflected from the subject, which sets the duration of the main flash at time of exposure. Some cameras also employ automatic fill-flash, where the flash light and the available light are balanced. While these capabilities are not unique to the SLR, manufacturers included them early on in the top models, whereas the best rangefinder cameras adopted such features later.