For as much versatility as you get out of it, the Canon EF100-400 f/4.5-5.6 IS II USM lens is light weight, which means it’s great for traveling and backpacking. This is a particularly sharp lens with great glass and a smooth action collar. It also works well with extenders, which only adds to it’s versatility and value. The quick action zoom makes it a go-to lens for me for capturing wildlife.
What are some of your favorite lenses that never leave your pack? Leave me a comment below, I’d love to know what’s out there, and check out my gear page for more recommendations!