Summary: Canon 40D, 28-135mm lense, hood, flash, no more room left
Comment: When I first bought a digital SLR, I didn't realize how important a camera bag is. They are meant to hold everything you need, when you need it, so you can keep it safe and carry them around. The 2400 bag does just that, BUT only if you have a small quantity of equipment. I initially purchased this bag for my Canon 40D. For those who own one, they are quiet large in size. The picture that amazon shows doesn't really do justice unless you compare to a real size camera. I am only able to fit the body, 28-135mm lens (attached), including lens hood, and a speedlite flash inside. I am unable to carry anymore inside the main compartment. The rest of the compartments has the capacity to hold extra batteries, filters, and pamphlets just in case.
If you are serious about photography, you would want a bigger bag so you can carry more equipment. In general though, its a nice bag for those who don't use other lenses.
Also, the strap is not as long as you would expect. It barely allows you to carry on the shoulder, but it does.