The differences between the Ausf F1 and F2 related to the
introduction of the new gun. Ammunition storage was modified to
stow the larger rounds, the amount of ammunition carried was
increased and the gunner's and commander's seats were changed to
allow more room. The elevation mechanism was modified and an
auxiliary hand traverse was installed for the loader. Because of
the long barrel, a coil-spring counter-balance was installed for
the 7.5cm KwK40.