This is a pouch full of filters, but specifically three known as close-up die-outers. They come in plus one, which I don't use, plus two, plus four, and plus ten. With it plus ten, showing just how much glass is required. The details on this deadcat are fine within the normal focus distance, but horrible when you put it too close to the lens. But the plus ten filter can fix this. And the same can be said for the other materials like a lens, or even reflective surface like a label. Get yourself some close-up die-outers. Nature's inexpensive option for some macro shots.