Camera lens polarising filter Kenko 234295, 40.5 mm, circular polariser

Kenko 234295 is a circular polarising filter with a 40.5 mm thread diameter designed for use on lenses that accept 40.5 mm filters. The filter reduces reflections from non-metallic surfaces, increases color saturation and contrast, and helps reduce atmospheric haze in outdoor photography. It comes as a single-piece pack with a slim black finish suitable for landscape, architectural and product photography where glare control and improved color rendition are needed.

Advantages

The circular polariser decreases unwanted reflections and glare from glass, water and foliage while preserving accurate exposure metering and autofocus performance. It deepens blue skies and makes cloud detail more distinct when used at appropriate angles to the sun, and it can noticeably reduce the bluish softness of distant scenes caused by atmospheric haze. Its slim profile minimises vignetting on wide-angle lenses while the 40.5 mm threaded mount provides straightforward attachment to compatible lenses.

Suitable for

• Landscape photography to enhance skies and reduce haze
• Architectural photography to control window and facade reflections
• Product and still-life photography to suppress surface glare
• Outdoor portraiture where glare reduction from surroundings is required

Key specifications

• Filter type: circular polariser (PL)
• Thread diameter: 40.5 mm
• Finish: black, slim frame
• Pack quantity: 1 piece

How to use

Screw the filter onto the front thread of a lens that accepts 40.5 mm filters. Rotate the outer ring while observing through the viewfinder or on the camera monitor to obtain the desired level of polarization and glare reduction; maximum effect is typically achieved when the camera is positioned at a 30–40 degree angle to the reflective surface or when shooting at right angles to the sun for deepening sky color. After setting the polarisation, adjust exposure settings as needed since the filter may change light transmission. The circular design maintains compatibility with autofocus and exposure metering systems.

Usage recommendations

Use the filter when shooting outdoors to control reflections and improve color saturation; on wide-angle lenses check for vignetting and use the slim frame accordingly. Rotate the filter to tune the effect and set exposure after adjusting polarisation. For strongest sky enhancement, shoot at a right angle to the sun and at roughly a 30–40° solar elevation.