The “P” Mode is the first giant step in taking more control of the way
the camera handles your desired image capture.!
The “P” Mode however, always plays it safe and assumes that you are
hand holding the camera. !
It does take into account the focal length of the lens to set an
appropriate shutter speed in attempt to reduce any handshake. !
It generally follows the 1/focal length rule to establish the shutter
speed.!
In the “P”mode, the camera fully automates both aperture and speed,
changing both together per measured subject light. !
For brighter scenes, or subjects, the camera gradually closes the
aperture and sets higher shutter speeds, reaching the smallest F8 only
for very high speeds at or above 1/1000sec. !
For dark subjects the camera gradually opens the aperture and sets
slower shutter speeds. !