Yes, generally firmware versions are generally cumulative. That said, when you go to the firmware page, it has the specifics on any firmware, including any restrictions - you should always read that!
cheers, TREVOR
"The Amount of Misery expands to fill the space available"
"All the variety, all the charm, all the beauty of life is made up of light and shadow", Leo Tolstoy;
"Skill in photography is acquired by practice and not by purchase" Percy W. Harris
