...is that film is sensitive to light but it cannot
see what we do. Color and contrast are seen very differently
by film than our eyes & brain combination.
...the sensitivity of film is rated by its ISO speed.
The higher the speed, the more sensitive to light it is.
...some combination of aperture and shutter will
provide the correct exposure to the film so it can record as much
detail in a scene as possible.
...this correct combination of aperture and shutter
can be changed to various combinations yet yield the same exposure -
one faster shutter speed stop - one larger f-stop, etc.
...by selecting the appropriate f-stop, we can
affect the range of sharpness in a picture.
...by using a slower or faster shutter speed, we can
affect how blurred a subject is and that we have to be careful to
use a fast-enough shutter not to ruin our picture from "camera
movement".
...that we should get used to one type of film and
get to understand how it will react in different lighting
situations.
...that bracketing our favorite or difficult
exposure pictures can save the day.
