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Thin silver 49mm UV filter with black rim

Nisi

Nisi 49mm Round L395 SMC UV Filter camera filter

SKU CH-44AW-M9ES6

Ultra-thin 49 mm UV filter with 5.2 mm frame, L395 Japanese glass and double-sided multi-coating to prevent vignetting on wide-angle lenses

  • Ultra-thin 5.2 mm frame prevents vignetting on wide angles
  • Double-sided multi-coating maximises light transmission
  • Japanese optical glass delivers crystal-clear image quality
  • Shields front element from dust and impact damage
  • Easy-clean surface simplifies routine maintenance

49 mm L395 SMC UV Filter

The NiSi 49 mm Round L395 SMC UV Filter is a camera accessory designed for photographers who want to protect the front element of their lens from dust and damage while maintaining image clarity. It uses high-quality Japanese optical glass with double-sided multi-coating for optimal light transmission. The ultra-thin frame minimises vignetting on wide-angle lenses.

5.2 mm ultra-thin frame

The single specification that decides fit is the 5.2 mm frame thickness combined with the 49 mm thread diameter. This ultra-thin profile prevents vignetting on wide-angle optics where standard filters would darken corners. Buyers needing a thicker filter for lens-cap clearance or those using lenses with a different thread size cannot use this model.

Simple screw-on installation

Installation requires threading the filter onto the 49 mm front thread of the lens until snug; no tools are needed. The multi-coated glass surface resists smudges and is easy to clean with a microfibre cloth. The most common issue is cross-threading the aluminium ring if the filter is forced on at an angle.

Highlights

  • Ultra-thin 5.2 mm frame prevents vignetting on wide angles
  • Double-sided multi-coating maximises light transmission
  • Japanese optical glass delivers crystal-clear image quality
  • Shields front element from dust and impact damage
  • Easy-clean surface simplifies routine maintenance

Specifications

No published specifications for this item yet.

Questions about this item

What does the L395 wavelength rating mean when the filter is on my lens?

The L395 rating indicates the filter blocks ultraviolet light below 395 nanometres, reducing atmospheric haze while letting visible light pass for normal colour rendering.

What thread standard does the 49mm size follow and what does it limit?

It uses the standard 49mm front filter thread found on many lenses, so it fits any lens with that thread pitch and caps the maximum filter diameter at 49mm.

How much clearance does the 5.2mm frame need to avoid vignetting on a wide-angle lens?

At 5.2mm thick, the ultra-thin frame is designed to clear the front element of wide-angle lenses without adding enough depth to cause corner darkening.

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