Write a short description in your post concerning 3 of these topics. Add pictures

1 Camera Obscura

2 Pinhole describe the technique

3 Diaphram in a traditional digital or film camera

4 Shutter speed in a traditional o film camera

5 Wide angle lens

 6 Normal lens

 7 Telephoto lens

8 Depht of field

9 The black and white films

10 Chemical used to develop black and white films