I have a Nikon D3000 DSLR that I've had for two or three years. I have Nikor 55-200mm and Nikor 18-55mm lens. I am happy with the pictures I get for the most part. However, I want to be able to zoom farther as well as get fast action shots without the blur. My son plays golf so I want the zoom to get close-ups. My daughter plays volleyball and I want good action shots in a gym without getting all the blur of the ball. Is there a lens that will do both of these things for me? What should I get? Can I do what I want with the lenses I have but with a different setting, such as changing the f-stop? I try to research online, but I just get confused with all the photography lingo and numbers of lenses.