When to keyframe an effect

Most effects in Premiere Pro support the ability to keyframe.…This allows you to define particular values for the effect at a moment in time.…This is really useful for things like camera pans or dramatic changes with…sunrise and sunset, where you need to adjust the effect over time.…Let's take a look at an instance where this might be a problem.…In this particular shot here, we're shooting out to the ocean and throughout the…shot, you'll see that things change.…So for example, when we're down here by the sea, we're hanging out with the…peaks right around 80%.…

But as it starts to pan up into the sky and we pick up the clouds, you notice…that it's actually getting brighter than 100%; it's a bit overexposed.…And then as we go back down and then up again, there's a change. And in this…case we're really losing the pelican as he flies through the air, until of course he…dive-bombs into the water going after a fish, and the exposure is changed.…So throughout this shot we have dramatic differences in exposure, and this would…