COKIN Circular Polarizer 37Mm CPL Photo Filter Anti-Reflection

CIRCULAR POLARIZING FILTER 37mm M37 IN PERFECT CONDITION WITHOUT PACKAGING Circular polarizing filters are used to reduce reflections from non-metallic surfaces (windows, water, etc.) and reinforce the color density of the sky and/or foliage by absorbing reflected light. They also allow you to accentuate details such as clouds and make photos richer, with denser tones. Their effect cannot be reproduced via editing software. The Pure Harmonie polarizer has only a 1 f-stop impact on the amount of light reaching the sensor when screwed onto the lens. This makes it a photographer's favorite accessory, especially in low-light situations or combined with another filter. The example above shows how the PURE Harmonie polarizing filter neutralizes reflections while enhancing the colors of the imag.

eBay