Camera - SLR & DSLR

Camera is a tool, a device for recording visual images in the form of photographs, film, or video signals. We know its use. It is actually a box that controls the amount of light that reaches a piece of light sensitive film or other surface inside. The original cameras did not even have a glass lens. 

The first cameras used a tiny hole in the front of the box to allow in light and to focus the image onto the viewing surface. This is the same principle as when children punch a pinhole into a piece of paper in order to watch a solar eclipse projected through the pinhole and onto the ground.

The First Photograph: In 1827, Joseph NicephoreNiepce made the first photographic image with a camera Obscura.

SLR Camera

Single lens reflex cameras (SLR) use a mirror and prism system to allow photographers to accurately see the image that will be captured. This system uses one optical light path whereas previous cameras had two, one through the lens to the film and the other to the viewfinder.

DSLR Camera

DSLR stands for “Digital Single Lens Reflex”. DSLR is a digital camera that uses mirrors to direct light from the lens to the viewfinder, which is a hole on the back of the camera that you look through to see what you are taking a picture of.