Lyn, Sue has a DSLR. It has interchangeable lenses. So no zoom button.
Sue, the most common lenses for a DSLR is, 18 to 70mm and 70 to 300mm. That should cover anything that you would normally want to take.
By the way, if you havnt got one, get a card reader. Using the software that came with your camera your photo's will load quicker into the computer.A big plus is, when you connect the camera to the pc, you use the camera battery, flattens the battery very quickly. Using the card reader you are not using the camera batteries, and they load much faster. You didnt say what lense came with your camera