Focal Length Comparison
As nature photographers, getting close to your subject is always a challenge. It is very rare when the duck you’re after swims right up to you. Or, when the elk you have been following decides to turn and walk your way (non aggressively of course!). On the other hand, you may not want to get too close to your subject if it is something dangerous, like a bear. Sometimes there is just no alternative to having a big, expensive, telephoto lens. However, what is the extra focal length (and expense) really getting you?
Below are two demonstrations on how focal length affects your shots.