the E-10 will not fit without bulge the top of the bag .  there be about enough space for the equivalent of 4-6 aa battery behind padded partition on each side of the lens . there be also a small zippered front pouch .  the top be secure by a double zipper , a overlap 1-inch rain flap around all three side , and a large front flap with a snap buckle . all combine to make it rain resistent , but difficult to get into easily . do not close well with only the snap buckle for temporary use .  all in all , this be not a very convenient bag to use . it be well-constructed and sturdy .