Sigma WR Circular PL Filter CPL-21 and PTC‑21 / PUV‑21: Redesigned WR Filter Series
Sigma WR Circular PL Filter CPL-21 is part of Sigma Corporation’s fully redesigned WR filter series, the company announced from Kawasaki, Japan. The refreshed family — covering WR Ceramic Protector PTC‑21, WR Protector + UV PUV‑21 and WR Circular PL CPL‑21 models — introduces slimmer frames for large diameters, improved surface treatments to reduce internal reflections, and water‑ and oil‑repellent coatings across sizes from 52mm to 105mm.
The renewed lineup is engineered to preserve image quality while offering greater usability for photographers and cinematographers working with Sigma and other interchangeable lenses. Sigma has verified compatibility across its lens range to minimize vignetting on ultra‑wide optics while maintaining secure lens cap attachment despite the slimmer profiles.
Sigma WR Circular PL Filter CPL-21 — CPL-21 polarizer details
The Sigma WR Circular PL Filter CPL-21 family brings circular polarizers with Sigma’s water‑ and oil‑repellent (WR) coating. Available in 52mm, 55mm, 58mm, 62mm, 67mm, 72mm, 77mm, 82mm, 95mm and 105mm, the CPL‑21 filters reduce reflections and improve color saturation when shooting through glass, over water or in reflective environments.
Photographers and videographers using polarizing filters will find the CPL‑21 options sized for general-purpose stills and large‑format cinema lenses alike. The WR coating also eases cleaning and resists fingerprints and light soiling on set.
PTC‑21 Ceramic Protector — impact resistance and slim design
The Sigma WR Ceramic Protector PTC‑21 line offers a ceramic-based protective surface designed for high impact resistance alongside the familiar WR coatings. Offered in 67mm, 72mm, 77mm, 82mm, 95mm and 105mm, PTC‑21 frames have been optimized to be slimmer for the largest diameters while ensuring secure cap fit and minimal optical interference.
These protectors are intended for photographers who demand robust front-element protection without adding bulk to large-diameter setups.
PUV‑21 Protector + UV — basic protection with WR coating
The WR Protector + UV PUV‑21 provides UV attenuation together with water‑ and oil‑repellent coatings for everyday protection. In this launch the PUV‑21 is available in the largest diameters (95mm and 105mm), which are commonly used on cinema primes and big front elements.
PUV‑21 is positioned for scenarios where both UV filtration and durable front-element protection are required, while maintaining the slim profile introduced in this refresh.
Design, compatibility and use cases
Across the range, Sigma says the redesigned frame surfaces reduce internal reflections compared with earlier models, and the updated visual identity aligns the product look and packaging with Sigma’s 2025 brand refresh. The company verified compatibility with its interchangeable lens families so users can fit filters confidently on wide-angle to long prime lenses.
Use cases include landscape and travel photography (CPL‑21), studio and location production where a protective front surface is needed (PTC‑21), and large-format lens setups requiring UV attenuation plus weather‑resistant handling (PUV‑21).
Specs, pricing & availability
Announcement date: November 5, 2026
| Product | U.S. Price (USD) | Availability |
|---|---|---|
| Sigma WR Protector + UV Filter (PUV-21) | $168-$221 | Order today at FilmTools |
| Sigma WR Circular PL Filter (CPL-21) | $106-$355 | Order today at FilmTools |
| Sigma WR Ceramic Protector Filter (PTC-21) | $183-$558 | Order today at FilmTools |
For additional product details and international distributor contacts, see Sigma’s accessory pages at https://www.sigma-global.com/ and Sigma’s product pages for PTC/PUV/CPL series.
For other ProVideo Coalition coverage and related news see https://www.provideocoalition.com/category/news/.
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