Superzoom lenses: how much extra reach will a few more mm give you?

Superzoom lens reach: 200mm

One of the common questions we often hear from readers here at Digital Camera World involves lenses – specifically superzoom lenses. And it always comes down to this: when looking to buy superzoom lenses, it can be tempting to pay a little bit more for a longer focal length. But how much extra reach do you really get by shelling out more money for a superzoom with 20 or more extra millimetres?