The logo of Sigma photographic equipment features a symbol in the form of the Greek letter Σ, outlined with uniform line thickness and enclosed in a circle. This mark is used independently and visually refers to the brand name. The letter is designed with strict geometric proportions, and the circle gives it completeness while drawing attention to the core idea. The SIGMA inscription is used as a separate element and is written in uppercase letters with small serifs, giving the typeface character and readability. The current version of the corporate style was introduced in February 2025 and uses a black-and-white palette suitable for various visual formats.
Sigma Corporation was founded in Japan in 1961 by Michihiro Yamaki and has been manufacturing lenses, cameras, and lighting equipment since its inception. After his passing, the company was taken over by his son, Kazuto Yamaki, who continued the focus on engineering independence and high quality. All development and production are concentrated at a single factory in Aizu, Fukushima Prefecture, which ensures full control over the technological process at every stage. Sigma remains an independent manufacturer in the field of photographic technology, not part of any major group, emphasizing precision engineering, product durability, and technological autonomy.
