Digital single-lens reflex cameras (DSLR) form part of Surveillance Spy Equipment whose storage media of the captured image is an electronic sensor instead of 35 mm film. One of its most important attributes entails the use of automated control systems for most mechanisms.
I am particularly impressed with DSLR cameras that incorporate image post-processing functions in addition to RAW development, changing white balance and conversion to black and white. In general, most models integrate a system called Live View which raises the mirror allowing me to capture the image directly just like compact cameras. These devices still share many similarities (electromechanical devices) with their predecessors depending on the manufacturer.
Operation
As with 35mm film cameras, digital SLR cameras are divided into two separate components: the camera body and the lens. The latter is an interchangeable device independent of the camera, it allows me to fit the best lens for a particular target. This grants me the flexibility to adjust scope or coverage angle, including distortion (fisheye) or changing the focus plane (tilt-shift), among others.
You can regulate the light using a mechanism known as diaphragm and Surveillance Spy Equipment. The body of the camera contains a mirror, located 45° to the plane of an image. It is designed to deflect the rays onto a translucent screen (focusing screen), as such I can effortlessly visualize and focus the image.
Usually the light is reflected back to a pentaprism situated above the focusing screen, whose function involves the diversion of the image onto my view. I am in a position to then adjust it accordingly. At the time of the shot, the mirror flips up and opens the shutter mechanism, to let the light rays directly into the image sensor.
The DSLRs are a pleasure to work with as they also incorporate an LCD screen with which I preview the image immediately after shooting. This enables me to check with the help of a histogram that exposure was correct.
Differences between DSLR and compact digital camera
The first difference is that the goals are interchangeable and compatible with the objectives of film SLR (depending on manufacturer). Because these objectives were designed for 35mm film and the sensor is larger than in compact cameras. Although it may be the same size of a film (36×24 mm).
Full-frame sensors are usually installed in high-end models. In which case there is a multiplication of the focal length normally of 1.5x (Nikon, Pentax, Minolta, Sony), 1.3x and 1.6x (Canon) or 2x (Four Thirds System).
Small sensors are used in compact cameras, and they typically signify shorter focal lengths but have a high depth of field.
