The Hoya 52.0 mm C2 Blue Cooling Filter is a precise optical accessory for photographic applications, featuring a 52 mm thread diameter for compatibility with various camera lenses. This cooling filter utilizes a specially tinted blue glass element that subtly reduces the color temperature of captured images, making it particularly effective for correcting warm lighting conditions or creating specific atmospheric effects in photography. Made from multi-coated optical glass, the filter maintains image sharpness while minimizing reflections and stray light, ensuring high optical performance. The sturdy aluminum frame guarantees secure mounting without adding significant weight to the lens setup. With its standardized 52 mm thread size, this filter integrates seamlessly into compatible lenses, providing photographers with a reliable tool for color temperature adjustment and creative control in various shooting environments. The C2 designation indicates a specific blue cooling intensity within the Hoya filter system, delivering predictable results for consistent photographic outcomes.