B+W 82mm F-Pro Kaesemann Circular Polarizer MRC Adapter Ring for 4" Filter Holder irrespective of whether they are

irrespective of whether they are at infinity or at the close-focus range of the lens

Enhanced sensitivity range up to ISO 6400

special glass types with unique refraction properties

6 mm (related to the first lens surface in light direction) Focusing range 1 m to Infinity Distance setting Scales Combined meter/feet graduation Smallest object field 220 mm x 330 mm Largest reproduction ratio  1:9 Aperture Setting/Function With click-stops

B+W 82mm F-Pro Kaesemann Circular Polarizer MRC Adapter Ring for 4" Filter Holder irrespective of whether they areThis is a demonstration store. You can purchase products like this from Leica Store Miami. Circular polarizing filters are made for all cameras with beam splitters in the light paths of their TTL exposure meter and with auto focus lenses. Circular polarization has the same pictorial effect as linear polarization, but allows for proper exposure metering and or auto focus distance settings. The high end polarizing foils of the Ksemann type filters are