This one is for 55mm thread size.
Double threaded,with rotating frame.
The finest solid optical glass, ground and polished to the most practical thinness.
Heated-threated to avoid any distortion or focal shift, and each filter is subject to strict tests in order to ensure a perfect even surface which is essential to a good filter.
Ultra-violet: Absorbs ultra-violet rays without increase of exposure, thereby preventing hazing and foggy effects in distant landscape. Constant use of this filter is recommended for clearer pictures as well as a lens protector.
CIP polarizing: Removes or reduces reflections from non-metallic surfaces, darkens, blue sky while increasing color saturation penetrates haze. Simply rotates the filter in its mount until the optimum effect is obtained.
Weight: 44.94 g
Size: 184.108.40.206 cm
1 × 55mm Gradual Neutral Density ND Filter Lens Film