CPL Circular Polarizing Filter (C-PL) 52mm PL Filter Circular PL Polarizing Filter Compatible with Wide-Angle Lenses Brand new, unused. This is a thin-frame (5.2mm thick) filter compatible with wide-angle lenses. Materials: Filter: High-quality optical glass Filter Ring: High-quality aluminum alloy Product Features: PL filters remove surface reflections from the subject, enabling extremely vivid color expression. Effects include removing surface reflections from water and glass, deepening the color of the blue sky, and making the colors of foliage, mountain surfaces, and buildings appear extremely vivid. Circular polarizing filters (circular PL) cut out light of specific polarization directions and convert the transmitted polarized light into circular polarized light. Using a linear polarizing filter with a digital camera may cause malfunctions in autofocus and other operations, so circular polarizing filters are used. Polarizing (PL) filters remove unwanted reflected light, vividly capturing the colors of the subject. They deepen the blue sky, make clear streams and seas clearer, and reproduce the vivid colors of fresh greenery and autumn leaves. This is an indispensable filter for landscape photography in spring, summer, autumn, and winter. It is housed in a rotating filter frame, and you can control the degree of reflection removal by rotating the front frame little by little. [Reference] What is a PL (Polarizing) Filter? PL (Polarizing) filters are short for Polarized Light filters, and they are lens filters that utilize a polarizing film. They generally have a structure where a polarizing film is sandwiched between two pieces of glass, and they have a rotating frame structure to rotate the direction of the polarizing film. PL (Polarizing) filters remove surface reflections of light and provide extremely vivid color effects. They have the effect of "reflection removal" on water surfaces and glass, as well as the "color contrast" effect of deepening the color of the blue sky and making the colors of foliage, mountain surfaces, and buildings appear extremely vivid. There are two types: 《Circular PL (C-PL)》 for AF cameras (also usable with manual cameras) and 《PL》 for manual cameras, but there is no difference in their effects. Please use the appropriate filter according to your camera. Accessories: No filter case