High-quality polarizing filter for reducing glare and enhancing color saturation Rotatable filter ring for adjustable polarization intensity Compatible with other filters due to front filter threads design Constructed from durable optical glass and aluminum-alloy for clarity and longevity Ultra-slim design with 10 layers of anti-reflection coating to prevent ghosting and reflections Ideal for use with digital cameras and autofocus lenses, reducing exposure by 1.3 stops