Lowepro Flipside 200 Backpack Bag ***Ideal for camera body with a long lens like 150-600mm***

Lowepro Flipside 200 Backpack Bag

***Ideal for camera body with a long lens attached, like 400mm, 100-400mm, 150-500mm or 150-600mm***

Carry your long lens and body in this separate bag then you don't have to mount and dismount body every time

or

for camera kit with one body, few lenses and accessories

Pics of actual bag