Nikon Close-up Attachment Lens #1 provides an easy way to increase magnification. The #1 can be used alone or with 0, 2, 3T, 4T, 5T or 6T close-up attachment lenses. When attached, you can use automatic exposure control and TTL metering. The higher the close-up lens number, the closer you can focus. The attachment lens is equipped with Nikon Integrated Coating to improve contrast and reduce flare. The close-up lens #1 are recommended for lenses with a focal length to 50mm. This lens has a 52mm filter thread and 1.5 Diopter.