DSLR stands for Digital Single lens Reflex. In simple language, a DSLR is a camera that uses mirrors to direct light from the lens to the viewfinder. Viewfinder is a little hole where we peek behind the camera object image. How come no single word in DSLR stands, indeed there is a double? No, his name is an alias TLR camera twin lens reflex, TLR is a technology that is almost extinct.
What are the innards of a DSLR camera?
To be clear, the following diagram DSLR camera:
Mirror reflection (reflex mirror)
How does the DSLR camera
Overall DSLR cameras work processes happen very soon, but let’s for the sake of trivial split into 3 phases:
When we peeked in the hole behind the camera viewfinder, Whatever that there is what looks right into the final image. Reflected light from the object image coming through the lens and the mirror-reflection (2) which then reflect light into pentaprisma-(7). Pentaprisma convert vertical to horizontal light by directing light into two separate mirrors, and into the viewfinder-(8).
When we take pictures, a mirror reflection / mirror-reflex (2) swings up and let the light continue straight ahead. Shutter-(3) is then opened so that the light had entered the digital sensor (4). Shutter-(3) will remain open during the specified shutter speed and sensor-(4) will continue recording the light information. When finished, the mirror-reflex (2) will return to the starting position of the lens so that light will bounce up and re-appear in the viewfinder.
The third process is the process that occurs in the digital sensor (4) where the images are processed by a computer (processor) in the camera. Processor will take the information recorded on the sensor, turning it into a suitable format and write to the memory card.
whole process above only happens in a split second, unless you are photographing bulb, even upmarket DSLR cameras can complete 11 consecutive above process within one second.