Flow Chart: Do You Need an F2.8 or an F4 Zoom Lens?

We're sure that many of you are trying to figure out whether you should go with f2.8 or f4 zoom lenses. Some folks type this into our search engine reasonably often, and it's clear that people don't know what they need. Of course, there are pros and cons to each. Do you need the extra stop of light? Do you prefer a lightweight body? What subject matter are you photographing? Do you need or want that extra stop of light? There are a host of essential questions that one should answer when they are...