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Fit the Sigma AFG-940 Multi-Coated 77 mm UV Filter to the front of your lens for better colours in your photos, and protection to boot.Digitally optimised UV filterEnhanced by Sigma's EX DG multi-layer lens coating, this high-grade UV filter helps to cancel out the extreme reflective characteristics of imaging sensors. In previous filter models, the image sensor would reflect light off the lens and filter elements, before re-admitting the same light, causing abhorrent ghosting in...
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