In number theory, σ is included in various divisor functions, especially the sigma function or sum-of-divisors function. In applied mathematics, σ (T) denotes the spectrum of a linear map T.

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Format Mirrorless 62 DSLR 26 Mount L-Mount 63 Sony E 65 Canon RF 9 Nikon Z 3 Canon EF 26 Nikon F 25 Canon EF-M 3 Sigma SA 24 Sony A 3 Fujifilm X 10 Micro 4/3 3 Pentax 2 Sensor …

The official global site of camera & lens manufacturing company Sigma.Here you can find information about our company and our products, support, repairs and inspections, as well as …

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Dec 24, 2025 · Adjective sigma (comparative more sigma, superlative most sigma) (Internet slang) Possessing characteristics of a sigma male.

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Sigma Corporation of America is a subsidiary of the Sigma Corporation, a Japanese based family owned manufacturer of DSLR cameras, camera lenses and camera accessories.

Canon RF Mount FUJIFILM X Mount Micro Four Thirds mount Nikon Z mount Sony E-mount SIGMA SA-mount Canon EF mount Nikon F mount Pentax mount Sony A-mount SENSOR …

Six Sigma is defined as a method that provides tools to improve business process capabilities. Learn how to integrate lean and Six Sigma at ASQ.org.