It's nice that you can rent them, rather than buy one and find out it's just your style. In the Everglades National Park, I was on a paved trail, taking in the sights and came across two men with fancy cameras, huge lenses, big tripods, and lots of gear in carts. They were there to get magazine-quality photos of bitterns, rails, and other birds that are hard to find, let alone photograph. But they were having trouble because the birds were too close for their long lenses!