I love them and use them almost every time I go out to photograph wildflowers. You have to practice to get use to how they work and because of the lens curvature you can get distortions but mostly when you try to zoom in to much. I will try to take some sample photos tomorrow. Before you buy make sure you know the thread diameter of your lens. If your camera has interchangeable lenses each lens may have a different diameter so buy the size needed for the lens you would be using most for close-ups.
