I am looking for a suitable backpack to carry the Canon 600mm 1:4.5 FD out to where it can actually be put to use. So, what do you wildlife and bird photogs with super telephoto lenses use? Ideally, the backpack should hold the lens, a body (or two), 2-3 smaller lenses and accessories. Are there any special backpacks for super telephoto lenses? Your suggestions/ideas are always much appreciated! Regards.