Summary: This is a great Backpack it contain a lot for it's size. I could easily fit a canon XS+ Battery Grip, 1 Ring flash Mr-14ex, 1x 18-55 is mounted on the camera, 1x 55-250 mm is, and 1x Mp-e 65mm. I still have place for a twin flash mt-24ex.
Summary: I carry Nikon D7000, 18 - 105, 70 - 200 / F4, 12 - 24 / f4, 50 / F1.8, 85 / F1.4, SB 600 along with chargers, batteries, filters and cards. It's a breeze. The bag is lightweight, carrying all the stuff I mentionioned is not difficult. Would have been happy if the padding was slightly thicker.