I put in the central compartment my Canon 100D mounted with its 18-55mm IS STM with sunshade (mounted in reverse) + TAMRON SP AF 70-300mm my F / 4-5.6 Di VC USD with sunshade (mounted reverse)! And it goes well! This is exactly what I wanted. However, I still want to point out that the Canon 100D is a "very" small SLR. A big DSLR will never return with a telephoto ...
The exterior zip expands the capacity of the bag and 30% is really convenient!
Once fully open, I can put (besides the central compartment) a Canon 50mm 1.8 II, my cable, battery charger, plugs and Boitie obj + filter box, my interval timer, a bottle of water 1.5L (yes it fits!), and the shelf compartment can accommodate a tablet (I'm not good eh! but it is possible!)
Design level: very good. The U shape makes it very comfortable shoulder bag.
I put 4 stars (although 4 and a half stars would be appropriate) as the central compartment, although adequate could be cushioned more, it would be a gain in protection. But I repeat that it is already very correct. And also a little rain cover is a plus!
I tested during my stay in Granada, I'm convinced!