is a Japanese company, manufacturing cameras, lenses, flashes and other photographic accessories. All Sigma products are produced in the company's own Aizu factory in Bandai, Fukushima, Japan. Although Sigma produces several camera models, the company is best known for producing high-quality lenses and other accessories that are compatible with the cameras produced by other companies.

The company was founded in 1961 by Michihiro Yamaki, who was Sigma's CEO until his death at age 78 in 2012.

Sigma products work with cameras from Canon, Nikon, Fujifilm, Pentax, Sony, Olympus and Panasonic, as well as their own cameras.

Sigma has also made lenses under the Quantaray name, which have been sold exclusively by Ritz Camera. Similarly, Sigma lenses were sold exclusively by the former Wolf Camera, but following the merger of Wolf and Ritz, both brands could be purchased.

Sigma's digital SLRs, the SD9, SD10, SD14 and SD15, plus the latest SD1 are unusual in their use of the Foveon X3 image sensor. The company's mirrorless cameras, the Sigma SD Quattro and SD Quattro H, use the Foveon Quattro sensor, an updated version of the Foveon X3. All use the SA lens mount. The Sigma DP series of high-end compact P&S cameras also use the Foveon Quattro sensor, which gives them a much larger sensor than other cameras of this type.

In September 2018 Sigma became one of the founding members of the L-Mount Alliance; it announced that it will cease to develop SA-mount cameras and instead use the Leica L-Mount. A new full-frame mirrorless camera, Sigma FP, was launched in 2019 along with a range of L-Mount lenses and adapters.

Sigma is the world's largest independent lens manufacturer and is a family-owned business.

Cameras

Up until the Sigma FP, all Sigma SLR, DSLR, and mirrorless cameras used the Sigma SA mount, which is mechanically similar to the Pentax K mount and electrically an adaptation of the Canon EF lens mount lens control system.

Sigma has been one of the first companies to experiment with putting the Foveon X3 sensor in consumer digital cameras. During photokina 2010, Sigma announced a new flagship DSLR camera, the SD1, featuring a 46MP Foveon X3 sensor. In recent years their DSLR range has been discontinued in favor of mirrorless designs.

Film Cameras Sigma has made a number of film SLR cameras, including the SA-300, SA-5, SA-7 and SA-9.

Digital Cameras Sigma DP Sigma also produced the DP series of high-end compact digital cameras. The Foveon APS-C sized sensors were similar to those used in the DSLR line. The most-recent line made use of the Quattro sensor, a variant of the Foveon design that had higher resolution top layers and lower resolution lower layers combined into a final image, claimed to be equivalent to a 39 megapixel color filter array image. The four compact cameras were differentiated by their fixed prime lens, with the ultra wide DP0, the wide DP1, the normal DP2 and the telephoto DP3.

Sigma SD Quattro & SD Quattro H In February 2016, Sigma announced two new mirrorless cameras—the SD Quattro and SD Quattro H. Both cameras used the full-depth Sigma SA mount, allowing the use of existing SA-mount lenses, and also used Foveon Quattro sensors. The SD Quattro uses an APS-C sensor with 19.6 MP in the top layer, while the SD Quattro H used an APS-H (1.35x crop) sensor with 25.5 MP in the top layer. The company claimed that the Foveon Quattro technology produced a level of detail equivalent to that of a Bayer sensor with twice the pixel count.

Sigma fp In July 2019, Sigma announced the Sigma fp, a small form-factor, 24.6MP full-frame mirrorless camera. At the time of launch it was the world's smallest. This was followed by the FP-L in 2021 with a 61mp sensor. Both cameras were able to shoot up to 14-bit RAW video.

Sigma BF In April 2025, Sigma announced the launch of the Sigma BF camera, said to stand for "Beautiful Foolishness". The user interface is intentionally minimal, utilizing only three buttons and one dial. The BF camera is equipped with a 24-megapixel full frame back-illuminated CMOS sensor. As Sigma is part of the L Mount alliance, the Sigma BF is fitted with an L mount. Uniquely, the BF camera relies primarily on 230GB of internal storage rather than typical memory card slots.

Software Sigma produces multiple software packages for use with their cameras and lenses.

SIGMA Photo Pro - Software for post-production of their camera's .X3F raw image format. It is available both for Mac OS and Microsoft Windows. SIGMA Optimization Pro - Software for updating lens firmware and performing calibration and customization. SIGMA Capture Pro - Software allowing remote control and image capture from select Sigma cameras.

Lenses

Sigma makes autofocus lenses for the Sigma SA, Canon EF and RF, Nikon F and Z, Fujifilm X, Minolta/Sony α and E, Pentax K, Leica L, Four Thirds, and Micro Four Thirds lens mounts. Each lens may not be available in all mounts, and may lack certain features (such as HSM) on certain mounts.

In August 2013, Sigma announced that starting the following month, it would offer a mount conversion service for its newest "Global Vision" lenses—those with either an "A" (Art), "C" (Contemporary), or "S" (Sport) as part of their model name. For a cost that varies with lens and market—from $80 to $250 in the U.S., not including shipping costs—owners can send their lenses to their local Sigma company, which in turn sends them to Japan for mount replacement, including calibration and optimization for the new camera system. Lenses designed for DSLRs can be converted to Canon EF, Nikon F, Pentax K, Sigma SA, or Sony A mounts; those designed for MILCs can be converted to Micro Four Thirds or Sony E-mount.

Designations

A — "Art Series", large aperture prime and zoom lenses, high optical performance. USB dock compatible. Part of 2013 lens lineup restructuring. APO — Apochromatic lens element(s), originally for "Advanced Performance Optics", not necessarily apochromatic ASP — Aspherical lens elements C — "Contemporary Series", combining optical performance with compactness. USB dock compatible. Part of 2013 lens lineup restructuring.

DC — "Digital Compact", lenses only for cameras featuring APS-C size sensors DF — "Dual Focus", lens features clutch to disengage focus ring when in AF mode DG — "Digital Grade", coatings optimized for DSLRs, full-frame as well as APS-C, also usable on 35mm film SLRs DL — "Deluxe", indicates lower-end film era lenses DN — "Digital Neo", lenses for mirrorless interchangeable-lens cameras (no longer used) EX — "Excellence", EX-finish, high performance series. FLD — "'F' Low Dispersion" glass, the highest level low dispersion glass available with extremely high light transmission. This glass has a performance equal to fluorite glass which has a low refractive index and low dispersion compared to current optical glass HF — "Helical Focusing", front element of lens does not rotate (useful for polarizing filters and petal lens hoods) HSM — "Hyper-Sonic Motor", either in-lens ultrasonic motor or micro-motor, analogous to Nikon SWM (AF-S) (ultra-sonic or micro-motor), Canon USM (ultrasonic or micro-motor), Minolta/Konica Minolta/Sony SSM (ultrasonic motor) or Sony SAM (micro-motor), etc. IF — "Inner Focusing", length of lens does not change during focusing, no rotating front elements OS — In-lens "Optical Stabilization", analogous to Nikon VR or Canon IS RF — "Rear Focusing", lenses employing rear-focusing, no length changes during focussing, no rotating front elements S — "Sports Series", telephoto and super-telephoto lenses. USB dock compatible. Part of 2013 lens lineup restructuring. UC — "Ultra-Compact"

Zoom lenses

Wide-angle zooms Focal length Aperture EX full-frame HSM Series Note 8–16mm 4.5-5.610–18mm2.8CDN10–20mm 4-5.610–20mm 3.512–24mm 4.5-5.6Aspherical12–24mm II 4.5-5.6Aspherical12–24mm 4A14-24mm 2.8ADN14-24mm 2.8A15–30mm 3.5–4.5Aspherical16-28mm 2.8CDN17–35mm 2.8–4Aspherical 18–35mm 3.5-4.5Aspherical20–40mm 2.8Aspherical21–35mm 3.5-4.224–35mm 2A

Standard zooms Focal length Aperture EX full-frame OS HSM Series Note 17-40mm 1.8 A 17–50mm (2010) 2.8 17–70mm 2.8–4.5MACRO 17–70mm 2.8-4.0MACRO 17–70mm 2.8-4.0CMACRO 18–35mm 1.8A 18–50mm 2.8 18–50mm 2.8CDN 18–50mm (2006) 2.8MACRO 18–50mm 2.8-4.5 18–50mm 3.5–5.618-200mm 3.5-6.3CMACRO 24–60mm 2.8 24–70mm 2.8MACRO 24–70mm 2.8 24–70mm 2.8ADN 24–70mm 2.8A 24–70mm 3.5–5.6Aspherical HF 24–105mm 4A 24–135mm 2.8–4.5Aspherical IF 28–70mm 2.8 28–70mm 2.8 28–70mm 2.8DF 28–70mm 2.8 28–70mm 2.8CDN 28–70mm 2.8–4 28–70mm 2.8–4UC 28–70mm 3.5–4.5UC 28–80mm 3.5–5..6Aspherical Macro 28–84mm 3.5–4.5 28–85mm 3.5–4.5 28–105mm 2.8–4 28–105mm 3.8–5.6Aspherical IF 28–105mm 4–5.6UC 28–135mm 3.8–5.6 28–135mm 4–5.6 28–200mm 3.5–5.6Macro 28–200mm 4–5.6 28–300mm 3.5–6.3Macro 28-300mm 3.5-6.3DL Hyperzoom Aspherical IF 35–70mm 2.8–4 35–70mm 3.5–4.5 35–80mm 4–5.6DL 35–105mm 3.5–4.5Macro 35–135mm 3.5–4.5 35–135mm 4–5.6UC 35–200mm 4–5.6 39–80mm 3.5XQ16-300mm3.5-6.7C

Telephoto zooms Source: Focal length Aperture EX full-frame OS HSM SeriesIntroduction Note 50-100mm 1.8A2016 50-150mm 2.8 50-150mm II 2.8 50-150mm 2.8APO 50–200mm 3.5-4.5APO 50–500mm 4–6.3 50–500mm 4.5-6.3 55–200mm 4–5.6 60–600mm 4.5–6.3S 70–150mm 3.5 70–200mm 2.82006MACRO 70–200mm 2.82005 70–200mm 4/3 2.82008 70–200mm II 2.82007MACRO 70–200mm 2.82010APO 70-200mm 2.8S2018 70-210mm 2.8APO 70–210mm 3.5–4.5APO 70–210mm 4-5.6 UC 70–210mm II 4-5.6 UC 70–210mm 4.5UC 70–250mm 3.5-4.5 70–300mm 4–5.6MACRO70–300mm4–5.6APO75–200mm2.8-3.575–200mm3.875–230mm4.575–250mm4.575–300mm4.5–5.6APO80–200mm3.580–200mm3.5-4.080–200mm4.5–5.680–400mm4.5–5.6100–200mm4.5100–300mm4100–300mm4.5–6.7DL 100-400mm 5-6.3C2020DN 100-400mm 5-6.3C2017100–500mm5.6–8APO Zoom Tau120–300mm2.8120–300mm2.8120-300mm2.8120–300mm2.8S120–300mm5.6120–300mm5.6-6.3120–400mm4.5–5.6APO135–400mm4.5–5.6150–500mm5–6.3APO150–600mm5–6.3C150–600mm5–6.3S170–500mm5–6.3200–500mm2.82x teleconverter included, allowing 400–1000mm 5.6300–800mm5.6APO350-1200mm11 APO300-600mm4S2025

Prime lenses

Wide-angle primes Focal length Aperture EX full-frame HSM Series Note 8mm 3.5Circular Fisheye 8mm 4Circular Fisheye 10mm2.8Fisheye Ultra-Wideangle12mm2.8Fisheye Ultra-Wideangle14mm1.8A14mm2.8Aspherical14mm3.515mm2.8Diagonal Fisheye16mm1.4CDN16mm2.8XQ Filtermatic Diagonal Fisheye18mm2.8Filtermatic18mm3.2 XQ18mm3.5XQ20mm1.4ADN20mm1.4A20mm1.8Aspherical RF20mm2CDN24mm1.4ADN24mm1.4A24mm1.8Aspherical24mm1.8Aspherical Macro24mm2CDN24mm2.8XQ Filtermatic24mm2.8Aspherical24mm2.8Super Wide24mm II2.8Super Wide24mm3.5CDN28mm1.4A28mm1.8Aspherical Macro28mm2.8XQ Filtermatic28mm2.8 Mini Wide II30mm1.4CDN35mm1.2ADN35mm1.4ADN35mm1.4A35mm2.8GN (guide number)

Standard primes Focal length Aperture EX full-frame HSM Series Note 30mm 1.445mm equivalent on most APS-C systems, 48mm equivalent on Canon APS-C, 51mm on Sigma, 60mm on Four Thirds 30mm 1.4CDN 30mm 1.4A available for Canon, Nikon, and Sigma mounts 35mm 2CDN40mm 1.4A 45mm 2.8CDN50mm 1.4 50mm 1.4A 65mm 2CDN

Macro primes Focal length Aperture EX full-frame OS HSM Note Macro 50mm 2.8 Macro 50mm 2.8 Macro 55mm 2.8XQ Macro 70mm 2.8 Macro 90mm 2.8 Macro 100mm 2.8XQ Macro 105mm 2.8 Macro 105mm 2.8 Macro 105mm 2.8 APO Macro 150mm 2.8 APO Macro 105mm 2.8 APO Macro 180mm 2.8 APO Macro 180mm 2.8 APO Macro 180mm 2.8IF APO Macro 180mm 5.6

Telephoto primes Focal length Aperture EX full-frame OS HSM Series Note 56mm 1.4CDN 85mm 1.4 85mm 1.4ADN 85mm 1.4A 90mm 2.8CDN 105mm 1.4 105mm 2.8ADN MARCO 105mm 1.4A 135mm 1.8A 135mm 1.8XQ 135mm 1.8Sigmatel 135mm 2.5 T-mount 135mm 2.8 135mm 3.5 200mm 2.8XQ 200mm 3.5 200mm 4APO 300mm 2.8APO 300mm 2.8300mm 4XQAPO 300mm 4MACROAPO 300mm 4 MACROAPO 300mm 4.5300mm 5.6400mm 5.6400mm 5.6MirrorAPO 400mm 5.6APO 400mm 5.6MACROAPO 400mm 5.6 MACRO500mm 4Mirror-UltratelephotoAPO 500mm 4.5APO 500mm 4.5500mm 4SAPO 500mm 7.2500mm 8Mirror600mm 8MirrorAPO 800mm 5.6APO 1000mm 81000mm 13.5Mirror

DC lenses for APS-C 4.5mm 2.8 EX DC Circular Fisheye HSM