Byzantine Armor and arms during the 13th Century

[Black Widow61]

Hi; I'm brand new, so I thought I'd ask this question. I belong to an SCA group, and I would like to do a Byzantine Army Officer during the 13th-14th Century. Can anyone tell me just what was the uniform of the Army to include the type of armor, helmets, swords, and shields?

Also are there any pictures I could see that would give me an idea on how I should look?

Thanks