2.Single-lens-reflex (SLR) Camera- This is a camera where the photographer sees exactly the same image that is exposed to the film and can adjust everything by turning dials and clicking buttons. Since it doesn't need any electricity to take a picture, a manual SLR camera provides an excellent illustration of the fundamental processes of photography.
3.The main function of a camera lens is to collect light. The aperture of a lens is the diameter of the lens opening and is usually controlled by an iris.The larger the diameter of the aperture, the more light reaches the film / image sensor.
4.It controls the length of time a picture is exposed.
5. The aperture shutter speed and film sensitivity or sensor sensitivity.
6. Slow film speeds are meant for outdoors.
7. The developer, stop bath, fixer, and hypo-clearing agent.