  
                            Product Description 
                              
                            
Sigma EX DG Wide Circular Polarizer/EX DG Circular 
Polarizer Multi coated filters optimized for Digital SLRs. 
The Sigma Corporation is pleased to announce the launch of the new 
SIGMA EX DG range of filters which is optimized for digital SLRs. 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 Circular Polarizing (CP) filters which eliminate 
reflections from subjects such as glass and water and deepen the intensity of 
blue skies. These Cir-Pol 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. 
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