Sigma 28mm f/1.8 EX Aspherical DG DF 10x High-Definition 2 Element Close-Up (Macro) Lens (77mm)

High-Definition +10 close-up (macro) attachment with beveled design. Optical assembly uses 2 Element construction of high-index / low-dispersion glass to retain clarity and minimize chromatic errors. All surfaces are fully multi-coated and finished with anti-reflection treatment to reduce flare and ghosting. Threaded for simple screw-on mounting to the lens specified in the title (77mm).