A:AnswerYour 18-55mm Nikon kit lens has 52mm threads (at least the current version of the Nikon 18-55mm kit lens does). This should be indicated on the front of the lens by a mark that looks something like this: Ø52
Your 55-250mm lens probably also has 52mm threads. This should be indicated by a mark on the front of the lens that looks like: Ø52. I have found some online references to some versions of a Nikon 55-200 with 55mm and 58mm threads. But whatever is printed on the front of the lens next to the "Ø" mark is the thread size in millimeters. If you can't find such a mark on the front of the lens (or on the barrel near the front for some lenses) you can look on the back side of the lens cap that fits the lens. They often have the size marked as either 52mm or Ø52.
You can always use an accessory that has larger filter size threads with a smaller filter thread size lens by using a step up ring. The smaller threads on the back of the ring screw into the threads on the front of your lens. The larger threads inside the outer rim of the ring then receive the threads of your filters.
