Optical Precision Redefined: Sigma Unveils Redesigned WR Filter Series (CPL-21, PTC-21, and PUV-21)

KAWASAKI, Japan — In a move that signals a major update to its high-end optical accessory ecosystem, Sigma Corporation has announced a fully redesigned lineup of its Water- and Oil-Repellent (WR) filter series. Comprising the WR Circular PL Filter CPL-21, the WR Ceramic Protector PTC-21, and the WR Protector + UV PUV-21, this refreshed family…

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Beyond the Distance Scale: Why “Close Focus” is an Optical Illusion and How ARRI is Redefining Cinematographic Magnification

Executive Overview In the high-stakes world of professional cinematography, a persistent misunderstanding continues to shape how directors of photography (DPs), camera assistants, and visual effects (VFX) supervisors select and utilize lenses. For decades, the industry has relied on "close focus distance"—the minimum focus distance (MFD) marked on a lens barrel—as a primary metric to determine…

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