Digitally Optimised (DG) Filters
EX DG filters benefit from Sigma's multi-layer lens coating, developed to
counteract the highly reflective characteristic of image sensors. With older
style filters, light would reflect off the image sensor, bounce off the lens and
filter elements and re-enter the image sensor, creating a ghost image. The
multi-layer coating dramatically reduces this effect. In addition to this, an
optimum, neutral colour balance is ensured, increasing the white balance
accuracy of the digital camera.
Multi-coated UV Filter
This filter perfectly eliminates the harmful effect of ultraviolet light. The
multi-coated UV filter can be used with both colour and black-and-white film and
digital sensors. This is the most suitable filter for protective use and general
photography.
For more information about, Sigma 77mm EX DG Digitally Optimised UV Multi-Coated Glass Filter .
Customer Reviews on Sigma 77mm EX DG Digitally Optimised UV Multi-Coated Glass Filter
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.
