The Lowepro Flipside Trek BP 350AW offers a camera compartment that provides enough space for extensive equipment. Here are some details that can help determine whether a Sony 200-600 mm lens including camera body will fit inside:

- The camera compartment takes up about 50% of the total volume of the backpack, which is about 20.15 litres.
- The backpack is designed to accommodate various sizes of camera equipment, including larger lenses and camera bodies.

A Sony 200-600mm lens with a camera body should generally fit inside as the backpack is sized for such sizes. However, it is advisable to check the specific dimensions of your equipment and ensure that it will fit within the dimensions of the camera compartment.

As a rule, lenses of this size and camera bodies should fit into the Flipside Trek BP 350AW without any problems, but a detailed check of the dimensions is always recommended.