The K&F Lightweight measures in at a 17”x11” and consists of two main compartments; a smaller front compartment for laptops, tablets, accessories and a much larger rear compartment for cameras, flashes and lenses. The main internal camera compartment is plenty big enough to hold 2 cameras and up to 5 lenses. It's roughly 4.5” deep so it's deep enough to hold most 35mm and 50mm lenses stood upright and full frame bodies and all the internal inserts are removeable so you can reconfigure it until your hearts content. You may struggle however, if you have a Battery Grip on your camera (or use a Canon 1dx etc) as the compartment may not be quite deep enough but for most, it'll be plenty. There are also two small sleeved compartments (one of which is zipped) for memory cards and other small accessories. In my own use, I've managed to fit a Canon 6D with 70-200 attached, Tamron 35mm, Canon 28mm, Sony A7 with 35mm, Sony 85mm, Mavic Air and Mavic Air Remote with room to spare. It's also worth noting that this main compartment is located at the back of the bag and there is no quick access panel. If you need to retrieve anything from this compartment you need to take the bag off completely. This will be a deal break for those who need quick access to their equipment however, it does make the bag very secure as your expensive gear is completely inaccessible while the bag is on your back. Which is more important to you, speed or security? The front compartment comprises of two padded sleeves for tablets and laptops (up to 13”) and a mesh sleeve for accessories etc. It's a decent size and will hold a Surface Pro and 10” tablet with ease. It's well padded too. Lastly there is a small compartment on the front of the bag for any additional smaller items and on the left side there is a very small side pocket for memory cards and an incredibly useful tripod strap/pocket. Fold out the pocket, slide your tripod through the strap and insert one of the tripod legs into the pocket, tighten the strap and you're good to go. Simple, elegant solution.