The new filters benefit from a super multi-layer lens coating developed
to counteract the highly reflective characteristics of digital image
sensors reducing both flare and ghosting. Black rimmed glass eliminates
unnecessary internal reflections.
The Sigma EX DG range comprises UV filters, which not only reduce
ultraviolet light but are ideal for protecting the lens during general
photography, and Circular Polarizing (CP) filters which eliminate
reflections from subjects such as glass and water and deepen the
intensity of blue skies. The range of CP filters, with the exception of
the 86mm, 95mm and 105mm, is encased within an ultra- thin metal ring
that does not cause vignetting with wide-angle lenses.
Each of these Sigma EX DG filters is designed to accept the front cap
of the lens.