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Clear circular glass filter with black metal rim, 52mm diameter

SIGMA

SIGMA AFA940 52mm UV Haze Protection camera filter

SKU CH-XMVV-7CCJ4

A 52 mm UV filter that blocks haze and protects the front element of any lens with a 52 mm thread

  • Size52 mm
  • Product typeUV, Haze & Protection
  • Compatible withAny Camera with lens thread size of 52 mm
  • Blocks ultraviolet haze for clearer outdoor shots
  • Protects the front lens element from dust and scratches
  • Multi-coated glass reduces flare and ghosting
  • Fits any lens with a 52 mm filter thread
  • Slim DG frame avoids vignetting on wide-angle lenses

Perfect lens protection

The SIGMA AFA940 is a 52mm UV haze and protection filter designed for photographers who want to shield their front element from dust, moisture and scratches. It fits any camera lens with a 52mm filter thread. The multi-coated glass reduces ultraviolet haze in outdoor scenes while maintaining image clarity. This filter serves as a permanent barrier for valuable optics.

Thread size is the only limit

The filter works solely with lenses that have a 52mm front thread; other diameters require a different size or a step-up ring. It adds negligible optical density, so exposure settings remain unchanged. The UV coating cuts atmospheric haze but does not replace a circular polariser for glare control. Vignetting may appear on ultra-wide lenses when stacked with other filters.

Simple screw-on installation

Align the filter threads with the lens barrel and turn clockwise until snug; no tools are needed. Over-tightening can bind the ring, making removal difficult. Always clean the front element before fitting to avoid trapping dust. Store the filter in its case when not in use to protect the coatings from fingerprints and scratches.

How it compares

Measured against everything we stock in Lens Filters & Polarizers, at today’s prices. Recalculated every night.

Price $9.99
Cheaper than about 93% of the 1,281 comparable items (median $48.99).

Specifications

Product
Brand nameSIGMA
Model nameAFA940
Product typeUV, Haze & Protection
Size & build
Size52 mm
Compatibility
Compatible withAny Camera with lens thread size of 52 mm

Questions about this item

Should I choose the 52mm version or a different size for my lens?

Pick the 52mm version only if your lens barrel or cap is marked 52mm; any other thread size will not fit.

What does the UV and haze protection actually do on a digital sensor?

It blocks ultraviolet light that can add a bluish cast in high-altitude or coastal scenes and shields the front element from dust, moisture and scratches.

Does the 52mm thread limit which filter systems I can stack or adapt?

The 52mm male thread accepts standard 52mm caps and step-up rings, but stacking additional filters increases vignetting risk on wide-angle lenses.

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