The hoya 49mm revo smc circular polariser filter allows you to significantly reduce reflections and glare from non metallic surfaces the revo smc polarising filter also enables colours to become more saturated and appear clearer with better contrast this effect is often used by landscape photographers to increase the contrast and saturation in blue skies and white clouds the revo smc circular polariser filter has been designed with a super slim aluminium frame to reduce vignetting and is rota