The 20 liter backpack will fit 1-2 mirrorless or DSLR cameras with 4-6 lenses (up to attached 70-200mm 2.8 ) plus a full-size iPad, with space left over for food and other personal items. It also fits a DJI Mavic and other compact drones. Extending the compression straps through the front lash points allows the bag to hold a jacket, blanket or other oversized item on the outside.