Attach the 58 mm Sigma AFC-940 Multi-Coated UV Filter to your camera lens for enhanced colours in your photos, & added protection too.UV filter with digital optimisation Bolstered by Sigmas EX DG multi-layer lens coating, this premium-quality UV filter helps to diminish the extreme reflective characteristics of imaging sensors. In older filter models, the image sensor would reflect light off the lens & filter elements, then re-admit the same light, resulting in objectionable ghosting in photographs. The multi-layer coating on this Sigma 58 mm UV Filter appreciably reduces this effect, ensuring a precise, neutral colour balance & better white balance accuracy in digital cameras. Superior colour & photo definition The A-FC94-0 58 mm Multi-Coated UV Filter flawlessly eliminates the harmful effects of ultraviolet light that can affect both sensors & images. It can be used with colour & black-&-white film & digital photographic sensors, giving your shots exceptional contrast & finer colour saturation.in addition, it protects the front lens element from dust & damage, so its physically as well as optically useful.A good choice for all-purpose photography as well as safeguarding your lens, the 58 mm Sigma AF-C940 Multi-Coated UV Filter is a sensible choice for growing your camera kit.