Close-up lens: It is a close-up accessory similar to a filter. It is like a magnifying glass to observe the scene alone. Its front side is convex for image magnification, while the back side is slightly recessed to reduce field curvature to a certain extent. . The close-up lens is a simple macro tool. The advantage is that it is convenient and does not need to compensate for exposure; the disadvantage is that there is spherical aberration, which is manifested as barrel deformation and distortion, and after the addition of close-up lenses, the focus of the lens is limited to a very narrow range, far and near I can't focus anymore. Close-up lens-main functions Using this lens can make the lens focus on objects much closer than usual, producing close-up images, such as flowers, insects, etc. or re-photographing text. How to use the close-up lens: manual focus is recommended There are 6 magnifications of the close-up lens. Color: Black Material: plastic + glass Package Contents: 1 x +1 Close Up Lens 1 x +2 Close Up Lens 1 x +4 Close Up Lens 1 x +10 Close Up Lens Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Descriptions: These close-up lenses enable you to get much closer than the minimum focus of a standard camera lens - mere inches from the subject! The Close-up Lens Set is for taking pictures of flowers, small collectibles, coins and stamps, insects, small creatures, or anything small that requires up-close detail. Each close-up lens maintains resolution and picture clarity while magnifying image size. Features: This macro filter set consists of four close-up filters allowing the photographer to achieve professional results at a low price Made of high quality optical magnifying glass cutting down the close-focusing distance of the lens The filters come in 4 different strengths: +1,+2, +4, +10