Formatt 4 x 4" 0.9 Neutral Density Filter

Use neutral density filters to reduce light's strength. Formatt, a company with three generations of professional filter-making experience, produces this 4 x 4" glass filter for your camera's lenses.

Features:

• Manufactured from Schott White Water Clear Optical Glass
• Consistent color and density to Kodak Wratten standards
• Precision grinding and polishing for optical flatness allowing use on even ultra-long focal length lenses
• Filter edges protected by a frame