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Thin circular polarizing filter with blue multi-coating and knurled aluminium frame

K&F Concept

K & F Concept 40.5mm Blue coat MC CPL camera filter

SKU CH-RGC3-FH5K7

A 40.5 mm circular polarizer with multi-coated Japanese optical glass and an ultra-slim aluminum frame to deepen blue skies, cut glare and boost saturation without vignetting

  • Deepens blue skies using Japanese optical glass
  • Multi-coating cuts reflection for better saturation
  • Ultra-slim aluminium frame prevents vignetting on wide angles
  • Rotating ring adjusts polarisation for water and foliage
  • Oxidised CNC frame blocks stray light entry

40.5 mm circular polariser filter

The K&F Concept 40.5 mm Blue coat MC CPL is a circular polarising filter built with Japan optical glass and a multi-coating stack. It deepens blue skies, cuts glare from water or foliage and improves overall colour saturation. An ultra-slim aluminium frame prevents vignetting on wide-angle lenses while the oxidised, blasted surface blocks stray light.

Landscape and outdoor photographers needing glare

Shooters who want richer skies, clearer water surfaces or more vivid foliage will benefit from the rotating polariser effect. The slim profile suits wide-angle work without dark corners. Photographers requiring neutral density for long exposures or infrared capture should look at dedicated ND or IR filters instead.

40.5 mm thread with slim-frame headroom

The 40.5 mm thread fits matching lens diameters directly and the thin rim avoids vignetting on wider focal lengths. Multi-coating keeps reflections low for cleaner contrast. The filter handles polarisation duties only; it provides no light reduction for motion blur or extended shutter speeds.

Highlights

  • Deepens blue skies using Japanese optical glass
  • Multi-coating cuts reflection for better saturation
  • Ultra-slim aluminium frame prevents vignetting on wide angles
  • Rotating ring adjusts polarisation for water and foliage
  • Oxidised CNC frame blocks stray light entry

Specifications

No published specifications for this item yet.

Questions about this item

What thread size must my lens have for this 40.5 mm filter to fit?

The filter mounts on any lens with a 40.5 mm front thread; check the Ø marking on your lens barrel or cap.

Will the ultra-slim aluminium frame clear the hood on my older wide-angle zoom?

The thin rim is designed to avoid vignetting on wide-angle lenses, so it should work with most hoods that clear the front element.

How can I confirm the polariser is cutting glare after I screw it on?

Rotate the filter while looking through the viewfinder or LCD; reflections on water or foliage will darken and skies deepen at the optimal angle.

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