B+W 39mm Master Clear MRC Nano 007M Glass Filter - Clear Protection

In this review the B+W 39mm MASTER Clear MRC Nano 007M is evaluated as a low-impact protective filter for small prime and wide lenses. The bottom line: it is for photographers who want a permanent, color-neutral protective layer with excellent surface repellency and minimal added reflections. The filter is notable for its MRC Nano coating that repels water and dust and for a thin, knurled mount that makes handling easier without adding visible effect to images. It is best suited to optical preservation rather than creative filtration.

Key Features

• Knurled Thin Mount: The black knurled thin profile provides a better grip and makes it easier to attach and remove without adding significant vignetting on wide lenses.
• MRC Nano Coating: The multi-resistant coating repels water and dirt so droplets bead and clean off more easily, reducing maintenance in adverse conditions.
• No Filter Effect: The glass is color-neutral and highly transparent, so it does not change color balance or introduce light loss when left on the lens permanently.
• Low Reflection: Extremely low reflection glass helps preserve contrast and prevents extra flares that untreated protective glass can cause.
• Format Coverage: Sized for use down to 17mm full frame format, making it suitable for many wide-angle applications where thin mounts matter.
• Authentication QR: A QR code is included to verify authenticity, giving confidence in the genuine B+W coating and construction.

Who It's For

Photographers who want unobtrusive lens protection and minimal optical compromise will appreciate this filter. Landscape, street, travel, and everyday shooters who leave a filter on the lens for protection will find value in the color-neutral glass and the water-repellent MRC Nano surface.

It is less relevant for anyone seeking creative color correction or ND/PL functionality since this model provides no filtering effect. Also, those using very large-diameter or specialty lenses should check compatibility, as this is a 39mm thread filter intended for smaller front elements.

Pros & Cons

Pros

• Excellent surface repellency from the MRC Nano coating, making cleaning easier in the field.
• Color-neutral, highly transparent glass means no visible change to exposures or color balance.
• Thin knurled mount improves handling and reduces the risk of vignetting on wide lenses.

Cons

• Provides protection only, so photographers needing polarizing or density effects must use additional filters.

Specifications

Brand	B+W
Model	MASTER 007M Clear
Filter Diameter	39mm
Coating	MRC Nano (repels water and dust)
Mount	Black knurled thin profile
Coverage	Good down to 17mm full frame format
Packaging	ECO-friendly packaging with QR code for authenticity

Our Verdict

The B+W 39mm MASTER Clear MRC Nano 007M is a practical, well-made protective filter for photographers who want to safeguard lenses without altering image quality. Its MRC Nano coating and thin knurled mount make it a sensible, long-term choice for small-diameter lenses, offering good value for those prioritizing protection and ease of maintenance.

Frequently Asked Questions

Will this filter change my lens color or exposure?
Answer: No, the filter is color-neutral and highly transparent, designed to have no filter effect or light loss.

Is the coating water resistant?
Answer: Yes, the MRC Nano coating repels water and dust so droplets bead and the surface is easier to clean.

Can I leave this filter on permanently?
Answer: Yes, it is intended to be safe to leave on the lens permanently as it does not affect image color or contrast.