Circular Polarizer Filter B+W 52E MRC — 52 mm thread, model 44838

B+W 52E Circular Polarizer MRC — 52 mm thread, model 44838 is a circular polarizing photographic filter designed for lenses with a 52 mm filter thread. It reduces unwanted reflections from non-metallic surfaces, increases color saturation and contrast, and helps deepen skies in outdoor and landscape photography. The filter uses high-quality optical glass and a neutral gray polarizer material to preserve accurate tonal rendering while providing the expected polarization effect. The MRC (Multi-Resistant Coating) improves light transmission, resists smudges, and eases maintenance.

Advantages

This circular polarizer delivers consistent polarization while maintaining compatibility with cameras that use through-the-lens exposure metering and autofocus. The neutral gray polarizer material ensures even image quality without color casts. The multi-resistant coating (MRC) is harder than glass, offering scratch resistance during cleaning and handling, and provides water- and dirt-repellent properties that make the filter easier to keep clean. The filter factor typically ranges between 2.3 and 2.8 depending on orientation relative to the sun, allowing predictable exposure adjustment.

Suitable for

• Landscape and nature photography to deepen skies and enhance foliage color
• Outdoor and architectural photography to reduce reflections from glass and water
• Product and still-life photography to control surface glare on non-metallic materials
• Any photographic workflow requiring accurate TTL metering and autofocus with a 52 mm lens thread

Key specifications

• Filter type: Circular polarizer
• Thread diameter: 52 mm
• Optical material: high-quality optical glass
• Polarizer material: neutral gray polarizing element
• Coating: Multi-Resistant Coating (MRC), scratch-resistant and water/dirt repellent
• Filter factor: typically between 2.3 and 2.8 depending on angle to light source

How to use

Screw the filter securely onto the front thread of any lens with a 52 mm filter mount. Compose and focus as usual; circular polarizers allow TTL metering and autofocus to function normally. Rotate the outer ring of the filter while observing reflections and sky contrast through the viewfinder or live view until the desired reduction of glare or enhancement of color is achieved. Account for the filter factor by adjusting exposure settings or compensating with camera exposure compensation when required.

Usage recommendations

Use the filter primarily when shooting at angles where polarization is effective (roughly 90° to the sun) to maximize sky darkening and reflection reduction. Avoid using a polarizer on ultra-wide angles where uneven polarization across the frame may occur. Clean the filter with a soft microfiber cloth and a suitable optical cleaner; the MRC coating reduces but does not eliminate the need for careful handling.