Hoya HD Circular Polarizer Filter 37mm

Polarizing Filter Functionality

Polarizing filters selectively allow polarized light rays to enter the camera lens, effectively removing unwanted reflections from non-metallic surfaces such as water or glass. They also enhance color saturation and contrast. The effect is visible through the viewfinder and can be adjusted by rotating the filter. The filter factor varies depending on the rotation and orientation relative to the sun.

Applications

This filter is ideal for outdoor photography, such as capturing cloud-filled skies or enhancing the saturation of water bodies like oceans or lakes. It can increase or decrease reflections on water and glass surfaces, providing creative control over reflections and color intensity. Additionally, when shooting black and white, pairing with a red filter can simulate dramatic stormy skies.

Technical Features

• Constructed with hardened glass offering 4 times the tensile strength of traditional filters.
• Incorporates special coatings to reduce internal reflections, resulting in clearer, brighter, and sharper images.
• 25% higher light transmission compared to standard polarizing films used in photographic filters.
• Eliminates ultraviolet rays to reduce haze in outdoor shots while polarizing light to remove reflections and increase color saturation without altering overall color balance.
• Enhances blue skies and makes clouds more prominent, especially when used at right angles to the sun.
• Features an 8-layer multi-coating to minimize reflections on filter surfaces, reducing flare and ghosting.
• Water and oil repellent, scratch and stain resistant.
• Demonstrates 4 times the breaking strength in ANSI standardized testing, tested against steel balls dropped from 127 cm onto the glass.
• Compatible with cameras using beam splitters in the TTL light meter path and with autofocus cameras.

Physical Characteristics

• Slim matte black aluminium frame.
• Designed for lenses with a 37 mm filter thread.