I am using a Peak Design Everyday Backpack 30L, for my Sony A7R2, 16-35mm F/4 lens, 55mm F/1.8 lens, Mavic Pro 2 + controller, and 2 extra batteries (3 batteries total), and obviously a bunch of other items, like 3 power banks, prisms, MSI GS63VR 15.6 inch screen, sunglasses, rocket air blower...