This 95mm +1-strength Circular Close-Up Diopter from Simmod is particularly useful for close-up shots that require greater magnification and a shallow depth of field. Diopters are most effective with anamorphic lenses but can also be used with spherical lenses. This +1-strength diopter is crafted using Schott BK7 glass with a 14-layer double-sided nano coating. For greater durability, the ring is constructed of electroplated brass and has front and back threading, allowing for the addition of filters or stacking for storage and transport.