Capacity: Mirrorless camera with 3-5 lenses or a DSLR with 2-3 lenses (up to 70-200mm 2.8), plus flash and accessories. The Cooper 13 Slim was built to accommodate a mirrorless camera with 3-5 lenses or a DSLR with 2-3 lenses (up to 70-200mm 2.8). The rear padded sleeve will hold a laptop up to 13 inches. There are tons of other reasons to love this amazing bag. Click over to the "Features" tab to learn more.