Gura Gear Bataflae 26L Backpack (Black) Exterior Dimensions: 14 x 18 x 9 inches (36 x 46 x 23 cm) Interior Dimensions: 13 x 17 x 7 inches (33 x 43 x 18 cm) Lightweight design utilizing high quality materials and techniques. Holds 400 f/2.8 attached to body or up to 500mm unattached with hood reversed Each bag comes with a removable seam-sealed adjustable rain cover.