As primarily a wildlife photographer, I rely on my long lenses to get the closest photos of the animals without intruding in the animal's space. The majority of the time I use a 500mm or 200-400mm lens.

But frequently I will switch out to my 70-300mm lens to get a photo of an animal in its environment. The wider angle at 70mm brings in more of the background but the lens still gives a little compression.

I have also done the reverse for a landscape photo. For example, using a 500mm lens on a full moon setting over a mountain ridge will give a tremendous compression effect that makes the moon look substantially larger in the photo.

As with a few other tips, go with the traditional first, especially in a situation that might change quickly. But if timer permits, switch out that lens or keep a different type of lens on a second camera body.