Model: 5256-Medium-Sized Packs Ideal if you're carrying one or two digital or film SLRs, 4-5 lenses and many accessories,

Model: 5258-Full-Sized Packs Ideal if you're carrying two digital or film SLRs, 6-8 lenses or a long tele-photo lens, and many accessories,

Internal Dimensions: 12 W x 6  D x 15 H30 x 15 x 38 cm External Dimensions: 13½ W x 10¼ D x 17 H 34 x 26 x 43 cm Weight: 5 lbs. 13 oz.

Internal Dimensions: 12 W x 6  D x 18 H30 x 15 x 46 cm External Dimensions: 13½ W x 11¼ D x 20 H 34 x 29 x 51 cm Weight: 7 lbs. 7 oz.