A digital single lens reflex (dSLR) camera isn’t just any old camera. It’s descended from the venerable SLR and shares many of its unique features. The main qualities that set apart the dSLR from other camera types are described in this list:
Single lens reflex: A mirror in the camera body bounces light up into the viewfinder and flips up, out of the way, when you take a photo. You can see through the lens when composing and metering.
Interchangeable lenses: Being able to change lenses means that you can configure your digital SLR and adapt to any situation.
Sensor size: A full-frame digital SLR has a sensor the same size as a 35mm frame of film. Full-frame digital SLRs are professional-level cameras and are very expensive (many thousands of dollars). Cropped-frame dSLRs have smaller sensors although even the smallest dSLR sensor is still much larger than the sensor on most compact digital cameras. Most digital SLRs have cropped-frame sensors.
Controls and controllability: Digital SLRs have far more controls than even the most advanced compact digital camera. Although digital SLRs most have automatic exposure and helpful scene modes, they’re more complex. The upside is that you can take the pictures you want to take.
Exceptions: Some cameras share similar technologies or design approaches with digital SLRs, but none capture the entire range of benefits and advantages.
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