The Circular Polarizing Filter features the following advantages:
- Eliminate reflected light: It effectively cuts glare on non-metallic surfaces such as water, glass and leaves, revealing finer details of underwater objects and shop window displays and boosting image clarity.
- Improve color saturation: By filtering stray polarized light, it deepens the hue of blue skies and green foliage, restores natural vivid colors, and delivers outstanding performance in landscape photography.
- Darken the sky: When positioned at roughly 90 degrees to the sun, it noticeably darkens the sky, sharpens the contrast between sky and land, defines cloud layers distinctly and creates a three-dimensional visual effect.
- Compatible with autofocus: Its circular polarization design prevents interference with camera metering and focusing systems, supporting the autofocus function of most modern digital cameras and DSLRs.
- Manual adjustment required: Rotate the filter adjustment ring to alter the polarization direction according to shooting scenes and light angles for optimal results. A tripod or shutter release cable is commonly recommended to avoid hand shake affecting adjustment accuracy.
- Reduce light intake: It generally reduces light intake by 1 to 2 exposure stops. Corresponding exposure parameter adjustments like widening aperture, slowing shutter speed or raising ISO are needed during shooting.