Question 1

What does a UV filter actually do on a digital camera?

Accepted Answer

On digital sensors, UV filters have less optical effect than they did on film — sensors aren't sensitive to UV the same way. In practice, the main job of a UV filter on a digital camera is physical lens protection: it shields the front element from dust, moisture, scratches and accidental knocks. In hazy outdoor conditions the B+W UV-filter MRC Basic 67 can also add a touch of contrast and clarity.

Question 2

What is MRC coating on a B+W filter?

Accepted Answer

MRC (Multi-Resistant Coating) is B+W's multi-layer hard coating applied to the filter glass. It reduces reflections, repels water droplets and grease, and makes the surface easier to clean. The B+W MRC Basic version uses fewer coating layers than B+W's top-tier MRC Nano, but it still performs well above single-coat or uncoated filters for everyday shooting.

Question 3

Which lenses use a 67mm filter thread?

Accepted Answer

67mm is a common filter size on mid-range zoom lenses. Popular examples include several standard kit zooms and telephoto primes in the Canon, Nikon, Sony and Fujifilm lineups. Always check your specific lens cap or barrel — the filter diameter is usually printed there, preceded by a ø symbol.

Question 4

Will the B+W UV-filter MRC Basic 67 cause vignetting?

Accepted Answer

The B+W UV-filter MRC Basic 67 uses a standard brass ring rather than a slim ring, which means it sits slightly deeper than slim-profile alternatives. On wide-angle lenses — roughly below 24mm equivalent — this depth can clip the corners of the frame and produce vignetting, particularly at wider apertures. On standard zooms and telephoto lenses using the 67mm thread, vignetting is not a concern. If you're primarily shooting wide, a slim-ring UV filter would be the safer choice.

Question 5

Is buying a used B+W 67mm UV filter safe?

Accepted Answer

Yes, provided the glass is clean and free of deep scratches or coating damage. Used B+W filters from a reputable source are inspected and come with a minimum 12 months warranty. B+W filters are built to last, so a second-hand example in good condition performs identically to a new one — the MRC coating doesn't degrade with normal use.

Question 6

Does a UV lens protection filter affect image quality or sharpness?

Accepted Answer

A quality filter like the B+W UV-filter MRC Basic 67 introduces no visible loss of sharpness under normal shooting conditions. The main risk with any filter is added flare when shooting directly toward a strong light source — removing the filter in those situations is the simplest fix. Cheap, uncoated filters are far more prone to this than an MRC-coated B+W.

Question 7

Should I leave a UV filter on my lens permanently?

Accepted Answer

Many photographers do, especially for outdoor or travel work where dust and moisture are a real concern. The trade-off is a tiny extra glass element in the optical path. If you're shooting controlled studio work with no physical risk to the lens, leaving it off is fine. For everything else — street, travel, nature — keeping the B+W UV-filter MRC Basic 67 on permanently is a practical choice.

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B+W UV-filter MRC Basic 67

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About the B+W UV-filter MRC Basic 67

What MRC Basic means

Who is this filter for?

Compatibility and frame thickness

Frequently asked questions