Camera it is a beautiful instrument invented by the human being which helps mankind in many ways. Cameras are used for taking pictures and recording videos, this picture and videos gives lot of knowledge to the people. Cameras are very much used in entertainment field and now in the modern world cameras are used for the security purpose which helps people by assuring safety. Let us discus some history about the cameras. First portable camera was invented in earlier 1660s by the person called Robert Hooke and then it is modified to small size by Johann Zahn in 1685, James Clerk Maxwell a Scottish physicist with the help of Thomas Sutton a photographer both together in earlier 1861 they made first color photo graph. To capture a good quality picture the camera should have good focal length lenses. The one thing everyone know is, cameras are used very much in entertainment field but if you look at the present developed world around you, cameras are used very much for security purpose, where ever you go Train station, Bus station, Shopping malls, Hotels, Restaurants, Gym, theaters, collages, schools, banks and even on streets you can find security camera hanging somewhere in the top looking at you. Security cameras are very good advantage for the peoples, because with the help of security cameras you can keep eye on all valuable things to keep them secure. This security cameras are operated very easily you just need to have a monitor room installed with monitors to watch everything on the monitor from cameras. When compare to a Digital camera the cost of security cameras are less. Now a days the technology is developed so much people are started building smart homes, where wireless surveillance cameras plays main role in assure security to people leaving in houses.
