A digital single-lens reflex camera (also called a digital SLR or DSLR) is a digital camera that combines the optics and the mechanisms of a single-lens reflex camera with a digital imaging sensor, as opposed to photographic film.
The reflex design scheme is the primary difference between a DSLR and other digital cameras.
In the reflex design, light travels through the lens, then to a mirror that alternates to send the image to either the viewfinder or the image sensor.
The traditional alternative would be to have a viewfinder with its own lens, hence the term "single lens" for this design. By using only one lens, the viewfinder of a DSLR presents an image that will not differ substantially from what is captured by the camera's sensor.
A DSLR differs from non-reflex single-lens digital cameras in that the viewfinder presents a direct optical view through the lens, rather than being captured by the camera's image sensor and displayed by a digital screen.
Features commonly seen in DSLR designs
mode dial on camera
A mode dial or camera dial is a dial used on digitalcameras to change the camera's mode. Most digitalcameras, including dSLR and SLR-like cameras, support modes, selectable either by a dial or from a menu. On point-and-shoot cameras which supportmodes a range of scene types is offered.
Here are the four main types of camera modes that can be found in most digital cameras today:
- Program (P)
- Shutter Priority (Tv) or (S)
- Aperture Priority (Av) or (A)
- Manual (M)
What is scene mode on a camera?
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