DSLRs / Digital Single Lens-Reflex Cameras

What is a Digital Single Lens Reflex Camera?

With a DSLR / Digital SLR camera or Digital Single Lens Reflex camera what you see through the optical viewfinder is exactly the same image that will end up in your photo. As you can see in the diagram whatever exact image you can view passes as light into (#2) the reflex mirror. This reflex mirror sits at a 45 degree angle within the camera chamber, right up until the moment you actually take the shot. This 45 degree angle allows the light to be reflected vertically upwards into a pentaprism (#7), which has the primary function of bouncing the light off the roof and then front side so that it ultimately is directed into (#8) the viewfinder and then your eye!


When you squeeze the trigger the same reflex mirror swings upwards, blocking the vertical pathway to the pentaprism (hence the split second that the viewfinder goes dark), and thus the light entering the camera lens continues in a straight line and reaches (#4) the image sensor. The photographer (manual modes) or camera (on automatic) will decide how long (#3) the shutter remains open for, and during that brief moment the light is able to pass through to the image sensor so the image can be recorded. After this the shutter closes again and the reflex mirror goes back to the same 45 degree angle so that the light image is again redirected into the viewfinder.

The image is then processed, stored in the preselected format and written onto whatever type of memory card the particular DSLR camera uses. This process can occur many times in a single second in many of the quicker digital SLR cameras today!

Please feel free to contact us here at Cameraverse if you would like some advice on which DSLR will best suite your needs.