C-PL Circular Polarizer Multicoated Multithreaded Glass Filter 40.5mm

In this review of the C-PL Circular Polarizer Multicoated multithreaded 40.5mm filter, the bottom line is simple: it is aimed at photographers and videographers using compact or rugged cameras who need reliable reflection control and richer color without adding bulk. The reviewer found the slim, heat treated glass and rugged metal filter ring deliver the expected polarization effect - reduced reflections from water and glass and improved color saturation - while the multithreaded design makes stacking or mounting straightforward. It includes a 1 year warranty, which helps justify the modest investment.

Key Features

• Circular polarizer: Removes unwanted reflections from non-metallic surfaces to increase color saturation and contrast in both photos and video.
• Multicoated glass: Coatings reduce flare and ghosting for clearer results when shooting toward bright light or the sun.
• Slim design: Minimizes vignetting on wide-angle or compact lenses while still providing full polarizing control.
• Rugged metal filter ring: The black finish ring is built to withstand regular field use and offers secure attachment to the included adapter.
• Multithreaded construction: Allows mounting additional filters or lens caps on top for flexible workflows in photography and video.
• Filter factor: Provides approximately +1.3 stop light reduction (between 2.3 and 2.8) so exposure adjustments are predictable when rotating the filter.

Who It's For

The C-PL is best for owners of compact rugged cameras such as the Olympus Stylus TOUGH TG-4 or similar models that accept 40.5mm filters via an adapter; it suits outdoor photographers who frequently shoot water, skies, or glass and want stronger color saturation and fewer reflections. Its slim profile and multithreaded face also appeal to videographers who need to stack neutral density or protective filters without vignetting.

Photographers who require variable neutral density control, very large-format glass, or advanced multi-element filter systems should look elsewhere - this is a purpose-built circular polarizer focused on convenience, ruggedness, and reliable polarization rather than advanced optical correction for specialist lenses.

Pros & Cons

Pros

• Effective reduction of reflections and improved color saturation visible through the viewfinder and LCD.
• Multicoated, heat treated glass helps control flare and maintains image clarity in bright conditions.
• Slim, multithreaded metal ring minimizes vignetting and allows stacking other filters or caps.
• Includes a 1 year warranty for added confidence in durability.

Cons

• Provides about +1.3 stops of light reduction, so exposure compensation is required in low light and may not match some stronger CPLs.
• Designed for 40.5mm setups and requires the correct adapter, so compatibility depends on your camera or lens threading.

Specifications

Filter type	Circular Polarizer (C-PL)
Diameter	40.5mm
Filter factor	Between 2.3 and 2.8 (approx. +1.3 stops)
Construction	Heat treated multicoated glass
Filter ring	Rugged metal ring, black finish, slim design
Mounting	Multithreaded for mounting lenses or additional filters
Warranty	1 year

Our Verdict

The C-PL Multicoated 40.5mm is a practical, well-made circular polarizer for compact and rugged camera users who need reliable reflection control and richer colors without bulk. Its slim, multithreaded metal ring and multicoated glass offer good value for outdoor shooters and videographers, provided you accept the moderate light reduction and confirm thread compatibility with your camera or adapter.

Frequently Asked Questions

Will this remove reflections from water and glass?
Yes. As a circular polarizer it reduces reflections from non-metallic surfaces and increases color saturation when rotated into position.

Does it cause vignetting on wide-angle cameras?
The slim design minimizes vignetting, but very wide-angle setups should be checked for compatibility before extended use.

Is the filter compatible with stacked filters?
Yes. The multithreaded face allows mounting additional filters or caps on top for flexible stacking.