Sigma LPT-21 Protector Filter (52mm)

The Sigma LPT-21 Protector Filter (52mm) provides dependable front-element protection while maintaining the optical performance and visual quality of your lens. Featuring a completely redesigned exterior that complements the appearance of Sigma lenses, this clear protective filter offers an unobtrusive way to safeguard valuable optics during everyday photography and video production.

Constructed from clear optical glass, the LPT-21 helps protect the front element against dust, dirt, and scratches without affecting exposure or altering color reproduction. This allows the filter to remain attached during regular shooting while preserving the natural characteristics of the lens and captured image.

Sigma has also applied an improved surface treatment to the metal filter frame to help minimize internal reflections. By reducing unwanted reflected light within the assembly, the design helps maintain clean image reproduction across a variety of shooting conditions.

An updated low-profile frame further improves compatibility by helping prevent unwanted vignetting, including when working with ultrawide-angle lenses. The streamlined construction keeps the filter close to the front of the lens while maintaining its protective functionality.

Combining 52mm compatibility, clear optical glass, improved reflection control, and a low-profile metal frame, the Sigma LPT-21 Protector Filter provides straightforward protection for compatible lenses without compromising exposure, color, or overall optical performance.