visible spectrum: gives light to a picture.
Image sensor:it is to store pictures.
Camera obscura: for projecting images.
Lens: to open up more to the picture.
aperture:enclosed hollow
shutter: takes one photo each time the user presses the shutter button
Exposer : the size of the aperture and the quality brightness
depth of field: the distance between the nearest and furthest objects that give an image judged to be in focus in a camera
F-stop: indicate affective apeture
focal length:distance between the center of the lens or curved mirror and its focus


https://www.google.com/search?q=what+does+depth+of+field+mean&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a.0

Back view for the canon is the hot shoe, mode dial, on/off lever.

Top view has the shifts of the primary canon rebel T3 which includes photo options to take close views and lower views