The most important is to understand the acronym of DSLR or “Digital Single Lens Reflex.” In the camera world, a DSRL is a digital camera that uses a mirror mechanism to either reflect light from a camera lens to an optical viewfinder. The viewfinder allows the light to pass onto the image sensor by moving the mirror out of the way. You are going to find out that many internet sources explain that the single-lens reflex cameras have been available in various shapes and forms even starting in the 19th century with film as the recording medium. As year passed, and the camera technology has matured, it was around 1991 when the first commercial digital SLR with an image sensor appeared. Compared to previous years when the point-and-shoot and phone cameras, the DSLR cameras typically use interchangeable lenses (Nikon, 2019).
What are the main components of a DSRL Camera?
Credit: Nikon USA (2019)
How does a DSRL really works?
Most DSRL cameras have a viewfinder or an eyepiece located on the back of the camera. We are not going to talk about the mirrorless camera. It would completely confuse how the viewfinder works. Traditional DSRL camera whatever you see is being passed through the lens attached to the camera, and then reflected through a series of mirrors including #2 and so forth until it reaches the viewfinder. In essence, the first lens (#2) sits at a 45-degree angle inside the camera chamber, and then, it transmits the light vertically to an optical element called a “pentaprism” (#7). The pentaprism then changes the vertical light to horizontal by redirecting the light through two individual mirrors, directly toward the viewfinder (#8) (Nikon, 2019).
When you are taking a picture, the reflex mirror (#2) rotates upwards, blocking the vertical pathway and allowing the light directly through. Then, the shutter (#3) opens up, and the light reaches the image sensor (#4). The shutter (#3) needs to remains open for as long as necessary for the image sensor (#4) to record the image. It is then the shutter (#3) terminates, and the reflex mirror (#2) falls back to the 45-degree angle to maintain redirecting the light into the viewfinder (Nikon 2019).
Nikon (2019) DSLR Camera Basics. Retrieved from https://imaging.nikon.com