Shutter Speeds (different) all at an aperture of f5.6.

1/30th @ f5.6

1/60th @ f5.6

1/125th @ f5.6 -
This is the light reading that the camera gave (on mode 'P' then adjusted on mode 'M').

 1/250th @ f5.6

1/5ooth @ f5.6

As the Shutter Speed increases (becomes faster)

- less light gets in the camera

-the image gets darker.