What goes in? In my case, my mountain equipment: Nikon D800 with 24-85 and 70-300, as well as 105s Micro - alternatively: Camera with 2.8 / 17-35, 1.4 / 50 or 60 Micro, and 4 / 70-200 - plus the usual bits and pieces. Larger lenses such as a 2.8 / 70-200 4/300 or find space in the upper Fressalien compartment, of course at the expense of other transportation in this compartment. A tripod (not included) to be strapped under the bottom of the backpack with straps. Who wants to lug necessarily the Battery Pack MB-D12, you can screw it under the bottom of the camera; the camera compartment is high enough for it. A laptop compartment is housed in front of the back pad. Those like me who does not know what to do on walks with a laptop can take advantage of this trade elsewhere. At a loading of such a backpack remains quite small and is easy to carry around. For those who want to haul larger amounts equipment with them, a larger backpack is recommended. Anyone who has a minor equipment (eg APS-C or MFT) can confidently to the smaller version of this pack (Aero 70) engage.
I already had the smaller version of this backpack for my APS-C equipment and was very happy with it. Whoever wants to can read my assessment in this regard at the appropriate product. The Aero 80 backpack deserves 5 stars for the very good price / performance ratio without compromising.