Sigma 77mm EX DG Digitally Optimised UV Multi-Coated Glass Filter advantages from Sigma's multi-layer lens coating, intended to counteract the extremely reflective characteristic of image sensors. With non-coated filters, light would reflect off the image sensor, bounce off the lens and filter elements and re-enter the image sensor, producing a ghost image and disturbing the quality of image. To eliminate the ghost effect the Sigma 77mm UV is applied multi-layer coatings that dramatically diminish this effect. On the other hand the resulting image is an optimum, neutral colour balanced. Sigma ultra-violet is compatible with both colour and black-and-white film and digital sensors. The 77mm EX DG UV Filter precisely removes the highly unwanted effect of ultraviolet light. It is the most effective filter for lens protection and general photography.
Customer Reviews on Sigma 77mm EX DG Digitally Optimised UV Multi-Coated Glass Filter
5 out of 5
Review by Edward English,
31/05/2011, Customer Rating:
Haven't had the opportunity to use the wide angle lens to which the filter is fitted, but I have to commend you on the promptness of delivery.
I chose the Sigma filter because I am extremely happy with the Sigma lens and the filter has been designed specifically for that lens.