B005OF328I Kata Pro-Light PL-3N1-25 Sling Backpack for DSLR Camera

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Designed to fit a DSLR with battery pack & mid-range zoom lens attached + 3-4 lenses
Quick side access to DSLR with battery grip, flash and backup lenses
Large upper compartment for personal gear
Rear padded compartment fits up to a 12” laptop
Quick-Draw one-hand pull-to-open buckle that saves you valuable seconds never miss another shot