The 3 mail elements of manual

3. Shutter Speed
 Shutter speed controls how
long the camera's shutter
stays open to admit light to
the digital sensor
 A lower shutter speed will
let in more light, but may
give your subjects motion
blur if they are moving in
the photo.
 High shutter speed will give
you less light and slow
motion down.
 Shutter speed is measured
in seconds

4.  Like the pupil in a human
eye, the aperture on a
camera controls light. It does
so by closing up to restrict
light, and opening up to let it
through.
 To get shallow D.O.F use a
lower number. Greater D.O.F
use a higher number.
 Aperture controls how much
light is allowed through your
lens by setting the f-stop.
 If you're shooting more than
one person, make sure your
aperture is at least the same
numbers there are people in
the photo

5.  ISO is an important setting.
It controls how sensitive
your camera’s image sensor
is to the light.
 In bright light use a low ISO
(outside), in low light you
can use a higher ISO (inside).
 The lower the number the
less sensitive your camera is
to light and the finer the
grain.
 The higher the ISO the more
the greater the noise will be
in you image.

8. NIKON CANON