DSLR stands for Digital Single-Lens Reflex camera. Actually, the name DSLR itself is quite descriptive of the way this type of camera works. Lets break the name to its sub-components & try to understand each one of them-
D stands for Digital- Here digital refers to the digital imaging sensor which is used in place of photographic film(used in traditional cameras). In simple words image sensor is a device that coverts optical image/signal to electric signal. Larger the size of sensor better will be the image quality. Imaging sensors used in current DSLRs are much larger than the sensors found in digicam cameras. Generally, the sensor type is either a CCD image sensor or a CMOS one. This is the characteristic which make DSLRs different from SLRs.
SL for Single-Lens- Single-lens means that DSLR uses a single lens for both the image sensor(for taking the actual picture) and also for viewfinder. This point will be more clear when we understand the "Reflex" design(next point).
R stands for Reflex- The main characteristic which differentiate DSLRs from other digital cameras is this reflex design. The reflex design consists of a mirror which can redirect the light either to the digital image sensor(for taking the photograph) or to the viewfinder. This is achieved by shifting the mirror between its original postion and to an angle of exact 45 degrees. In absence of reflex design, we will need two set of lenses- one for projecting the light over the sensor & another for viewfinder. This explains the Single lens feature of DSLR.
D stands for Digital- Here digital refers to the digital imaging sensor which is used in place of photographic film(used in traditional cameras). In simple words image sensor is a device that coverts optical image/signal to electric signal. Larger the size of sensor better will be the image quality. Imaging sensors used in current DSLRs are much larger than the sensors found in digicam cameras. Generally, the sensor type is either a CCD image sensor or a CMOS one. This is the characteristic which make DSLRs different from SLRs.
SL for Single-Lens- Single-lens means that DSLR uses a single lens for both the image sensor(for taking the actual picture) and also for viewfinder. This point will be more clear when we understand the "Reflex" design(next point).
R stands for Reflex- The main characteristic which differentiate DSLRs from other digital cameras is this reflex design. The reflex design consists of a mirror which can redirect the light either to the digital image sensor(for taking the photograph) or to the viewfinder. This is achieved by shifting the mirror between its original postion and to an angle of exact 45 degrees. In absence of reflex design, we will need two set of lenses- one for projecting the light over the sensor & another for viewfinder. This explains the Single lens feature of DSLR.
Picture courtesy Wikipedia
0 comments:
Post a Comment