I bought a a Lowe pro Rezo 160 a whileback but cant fit my 550d with 70-300 attached in it. I was just about to splash out on yet more overpriced kit and spotted this at £8.99, made up with it and a great bargain if you are in the UK and want a handy day bag. There are 4 types, this the best one IMO.
padded dividers- the gap in the middle is all the way to the bottom, in this configuration there are 4 x 50mm lens size sections either size of the main cavity
I reckon I could fit a battery grip on my 550d easily but as I dont own one I cant guarantee it so dont quote me Padding is about 8mm top/sides/bottom, the divider padding feels a bit thinner.
Hope some may find this useful