Description: "Sigma's 17-35mm F2.8-4 EX is one of several new EX Series lenses. It combines a fast F2.8-4 maximum aperture with ultra wide angle zoom lens of 17-35mm. It incorporates aspherical lens elements in the front, as well as rear lens groups, to correct spherical aberration. It also incorporates internal focusing to prevent deterioration of the optical quality at close distances and to eliminate rotation of the front barrel during focusing. A "perfect hood" is provided. The AF drive for Sigma SA and Canon S.L.R. cameras is equipped with a silent, responsive and fast Micro Hyper Sonic Motor (H.S.M.). The lens materials used in this new lens are lead and arsenic free ecological glass. "1

1. Sigma Photo (2000). Zoom Lenses. Sigma Photo-Lenses- Zoom- Ultra Wide http://www.sigmaphoto.com/html/zoom_ultrawide.htm (19. Oct. 2000)

Description: "The angle of view on this new zoom changes from 84° at 24mm to 24° at 70mm — an image perspective change that vastly increases your creative possibilities. Sigma's exclusive 4-group zooming system incorporates an aspherical lens to achieve excellent image definition throughout the range from wide angle to telephoto. Compact — just 2.4 inches long — and lightweight, this zoom is the perfect "standard" lens for your SLR. "1

1. Sigma Photo (2000). Zoom Lenses. Sigma Photo-Lenses- Zoom- Ultra Wide http://www.sigmaphoto.com/html/zoom_ultrawide.htm (19. Oct. 2000)

Description: "It features a fast, constant maximum aperture of F2.8 and covers the popular focal length range of 28mm wide angle to 70mm mid-range telephoto. Two aspherical elements help maintain its high optical performance throughout its zoom and focus ranges. It is the world's smallest zoom lens in this category, just 3.9" in length. A minimum focusing distance of just 15.7 inches, at all focal lengths, also gives it the world's shortest close focusing capability. The 28-70mm F2.8 EX is equipped with a perfect hood and incorporates helical focusing to eliminate front lens barrel rotation during focusing, for added convenience when using polarizing filters. "1

1. Sigma Photo (2000). Zoom Lenses. Sigma Photo-Lenses- Zoom- Ultra Wide http://www.sigmaphoto.com/html/zoom_ultrawide.htm (19. Oct. 2000)

Description: "SIGMA 28-70mm F2.8 EX ASPHERICAL DF is one of several EX-Series lenses to be introduced at Photokina 2000 by Sigma Corporation of Japan (2-13-15, Iwado-Minami, Komae-shi, Tokyo). It combines a fast, constant F2.8 maximum aperture with a popular range of focal lengths from 28mm wide-angle to 70mm medium range telephoto with an upgraded design. It is the world's smallest 28-70mm F2.8 zoom lens. The lens also incorporates a dual focus mechanism. It is easy to hold the lens, since the focusing ring does not rotate during auto-focusing and yet provides adequate focusing torque of the focusing ring during manual focusing of the lens. Helical focus system of the lens eliminates front lens rotation, thus allowing the use of a Perfect Hood and easy to use polarizing filters. It incorporates 2 aspherical lenses in the front and rear lens groups, provides high performance and superior optical quality. Minimum focusing distance is 40cm/15.7inches at all focal lengths. SIGMA 28-70mm F2.8 EX ASPHERICAL DF is equipped with a Perfect Hood to prevent extraneous harmful light for image quality. The lens materials used in this new lens are lead and arsenic free ecological glass. Available December 2000.
Specifications: Focal length: 28-70mm Maximum aperture: F2.8 Lens construction: 15 elements in 12 groups Zooming system : Rotary Angle of view: 75.4°- 34.3° Number of blades: 9 Minimum aperture: F32 Minimum focusing distance: 15.7" (40cm) Maximum magnification: 1:4.2 Filter size: 77mm External finish: EX finish Lens hood: Perfect hood with bayonet mount Dimensions: 3.3 in. (dia) x 4.0 in. (length) 83.6mm (dia) x 101.2mm (length) Weight: 22.7 oz (645g) Mount: Sigma SA, Minolta, Nikon (D), Pentax, Canon."1

1. Sigma Photo (2000). News. Sigma News Gallery-Sigma introduces. http://www.sigmaphoto.com/html/news/Pixfs_28-70df.htm (19. Oct. 2000)

Description: "Even with a wide f/2.8 aperture at 28mm, this versatile lens is lightweight (just 10 oz.) and compact (only 2.5 inches long). It uses Sigma's 4-group zoom system and floating element to prevent flare in difficult lighting situations and virtually eliminate astigmatism throughout the entire zoom range. What you get is improved image quality and some very impressive shots. A bayonet-type lens hood is included. "1

1. Sigma Photo (2000). Zoom Lenses. Sigma Photo-Lenses- Zoom- Ultra Wide http://www.sigmaphoto.com/html/zoom_ultrawide.htm (19. Oct. 2000)

Description: "Covering the most popular focal length range from 28mm wide to 80mm mid-range telephoto, this ideal zoom has tele-macro capability for a maximum magnification ratio of 1:2, plus a minimum shooting distance of under 9.5 inches. Everything from grab shots to portraits to close-ups are possible. Sigma's exclusive optical technology makes optimum use of aspherical lens elements to achieve results on par with fixed focal length lenses throughout the entire range. And with an overall length of 2.7 inches and a weight of under 9 oz., this lens is perfect for the photographer on the go.
Speficiations: Focal length: 28-80mm Maximum aperture: F3.5 (wide) - 5.6 (tele) Lens construction: 7 elements in 7 groups Focusing system : Helicoid focusing system Angle of view: 75.4° - 30.3° Number of blades: 8 Minimum aperture: F22 (wide) - F32 (tele) Minimum focusing distance: 19.7" (0.5m) at 28-80mm 9.4" (0.24m) at 80mm (Tele Macro) Maximum magnification: 1:2 Filter size: 55mm External finish: Zen finish Lens hood: Bayonet "Perfect Hood" Dimensions: 2.7 in. (dia) x 2.8 in. (length) 69.5mm (dia) x 71.4mm (length) Weight: 9 oz. (255g) Mount: Sigma SA, Minolta (AF), Nikon (D), Pentax, Canon."1, 2

1. Sigma Photo (2000). Zoom Lenses. Sigma Photo-Lenses- Zoom- Ultra Wide http://www.sigmaphoto.com/html/zoom_ultrawide.htm (19. Oct. 2000)

2. Sigma Photo (2000). News. Sigma News Gallery-Sigma introduces. http://www.sigmaphoto.com/html/news/Pixfs_28-80HF.htm (19. Oct. 2000)

Description: "This new generation of compact standard zoom lens retains the same 1:2 (Half Lifesize) Tele-macro capabilities of its predecessor. However, it incorporates a Helical Focusing system for convenient use of polarizing or graduated filters. This also allows a "Perfect Hood" (supplied) to be used. This lens also utilizes a new optical design, and a "flare-cut" aperture, providing even better optical performance. And a convenient "Depth Scale" is displayed on the lens barrel to help calculate Depth-of-Field. This is the most desirable lens in the 28-80mm category. Corresponding AF Mount: Sigma, Canon, Minolta, Nikon(D) and Pentax. "1

1. Sigma Photo (2000). Zoom Lenses. Sigma Photo-Lenses- Zoom- Ultra Wide http://www.sigmaphoto.com/html/zoom_ultrawide.htm (19. Oct. 2000)

Description:" This f/2.8 lens sets a new standard for all zooms. Its unusually large maximum aperture is made possible by an extra-wide aspherical lens to provide higher optical performance in a number of ways … including effective anti-flare features and crisp-to-the-edge images. An internal focusing mechanism allows the front of the lens to remain stationary and to easily accommodate specialty filters, such as polarizing filters. Sigma's original 4-group zoom mechanism keeps size and weight to a minimum while fully correcting astigmatism and distortion. Its wide range and convenience make it perfect for snapshots and great travel photos. "1

1. Sigma Photo (2000). Zoom Lenses. Sigma Photo-Lenses- Zoom- Wide to Telephoto http://www.sigmaphoto.com/html/zoom_wide2tele.htm (19. Oct. 2000)

Description: "Sigma Corporation is proud to announce the availability of the latest generation of compact standard zoom lenses, the 28-105mm f/3.8-5.6 UC III. This new lens builds upon its predecessors (models UC and UC II), offering the same focal length range (28mm to 105mm), and focusing range (19.7 inches to infinity, at all zoom settings) and providing a slightly larger effective aperture (f/3.8-5.6), while reducing the weight to less than 10 oz. A new lens design, including the use of aspherical optics and new mechanical construction, are credited with the reduction in weight, while maintaining the high level of performance for which these lenses are known. This model retains the internal focusing system and a non-rotating front barrel for convenient filter use.
Specifications: Focal length: 28-105mm Maximum aperture: F3.8-5.6 Minimum aperture: F22-32 Lens construction: 13 elements in 12 groups Angle of view: 75.4° - 23.3° Number of blades: 7 Minimum focusing distance: 19.7 in. (0.5m) Maximum magnification: 1:5.6 Filter size: 62mm External finish: Zen matte black Lens hood: Flower-shaped "Perfect Hood" Dimensions: 2.8 in. (dia) x 2.85 in. (length) 72.5mm (dia) x 71mm (length) Weight: 9.7 oz. (275g) Mount: Sigma SA, Canon (EF), Minolta (AF), Nikon (D), Pentax"1,2

1. Sigma Photo (2000). Zoom Lenses. Sigma Photo-Lenses- Zoom- Wide to Telephoto http://www.sigmaphoto.com/html/zoom_wide2tele.htm (19. Oct. 2000)

2. Sigma Photo (2000). News. Sigma News Gallery-Sigma introduces. http://www.sigmaphoto.com/html/news/Pixfs_28-105UCIII.htm (19. Oct. 2000)

Description: "Sigma 28-135mm F3.8-5.6 Aspherical IF Macro is one of several lenses introduced at PMA 2000 by Sigma Corporation. Incorporating aspherical optics, plus a floating inner focusing system, this lens minimizes spherical aberration and stigmatism. This lens can focus from infinity to 19.7 inches at all of the focal lengths without close-up accessory, and as close as 9.4 inches (1:2 reproduction ratio) at the 135mm zoom position. This lens incorporates an inner focusing system and features a non-rotating front lens barrel for convenient filter use. A custom designed "Perfect Hood" with bayonet mount is provided to prevent extraneous light from degrading the image quality.
Specifications: Focal length: 28-135mm Maximum aperture: F3.8 - 5.6 Lens construction: 13 elements in 12 groups Zooming system: Rotary Angle of view: 75.4° - 18.2° Number of blades: 7 Minimum aperture: F22 - F32 Minimum focusing distance: 19.7" (0.5m) at 28mm 9.4" (0.24m) at 135mm Maximum magnification: 1:5 (1:2 at 135mm Macro) Filter size: 62mm External finish: Zen finish Lens hood: Perfect hood with bayonet mount Dimensions: 2.9 in. (dia) x 2.9 in. (length) 75mm (dia) x 75mm (length) Weight: 14.4 oz. (410g) Mount: Sigma SA, Minolta (AF), Nikon (D), Pentax, Canon (EF)."1

1. Sigma Photo (2000). News. Sigma News Gallery-Sigma introduces. http://www.sigmaphoto.com/html/news/Pixfs_28_135.htm (19. Oct. 2000)

Description: "Sigma's 28-200mm F3.5-5.6 DL Aspherical Hyperzoom Macro is one of several new Sigma lenses. It incorporates one Aspherical Lens in the rear lens group and the one Special Low Dispersion (SLD) glass element in the front lens group. This high magnification zoom lens covers focal lengths from 28mm wide angle to 200mm telephoto, with closeup capability. It incorporates special internal focusing to enable it to focus as close as 19.7 inches (50cm) from film plane to subject, at all focal lengths (an optional accessory 72mm close-up lens allows even closer focusing and greater reproduction ratios), and to simplify the use of polarizing filters. A detachable "perfect hood" is provided. The optical materials used in this new lens are lead and arsenic free ecological glass. "1

1. Sigma Photo (2000). Zoom Lenses. Sigma Photo-Lenses- Zoom- Wide to Telephoto http://www.sigmaphoto.com/html/zoom_wide2tele.htm (19. Oct. 2000)

Description: "This new Hyperzoom provides a tremendous range of focal lengths (a 10.7:1 ratio), providing exceptional flexibility of composition, and allowing one to follow the movement of a subject throughout a wide range, without having to miss great shots while changing lenses. By utilizing a multi-group zoom cam system, this lens maintains a more consistently high level of performance throughout the focal length and focusing ranges. It also allows this lens to focus closer in the critical wide-angle ranges, than other zoom lenses in this focal length category. This Hyperzoom also provides high optical performance due to the use of Special Low Dispersion (SLD) and Aspherical Glass. It offers excellent portability because of its compact design, and since the front lens barrel does not rotate during focusing or zooming, the use of polarizing and graduated filters, and of a "perfect hood" to minimize flare, is greatly simplified. For many photographers, this is truly a universal lens.
Specifications: Focal length: 28-300mm Maximum aperture: F3.5 (wide) - 6.3 (tele) Lens construction: 18 elements in 16 groups Zooming system: Rotary Angle of view: 75.4° - 8.2° Number of blades: 8 Minimum aperture: F22 (wide) - F41 (tele) Minimum focusing distance: 28mm-0.88mm (34.64 in.), 35mm-0.94m (37"), 50mm-1.07m (42.12"), 80mm-1.17m (46.06"), 135mm-0.89m (35.03"), 200mm-0.83m (32.67"), 300mm-0.9m (35.43") Maximum magnification: 1:5 Filter size: 72mm External finish: Zen finish Lens hood: Perfect hood Dimensions: 3.11 in. (dia) x 3.74 in. (length) 79.1mm (dia) x 95.1mm (length) Weight: 20.46 oz. (580g) Mount: Sigma SA, Minolta (AF), Nikon (D), Pentax, Canon (EF)."1,2

1. Sigma Photo (2000). Zoom Lenses. Sigma Photo-Lenses- Zoom- Wide to Telephoto http://www.sigmaphoto.com/html/zoom_wide2tele.htm (19. Oct. 2000)

2. Sigma Photo (2000). News. Sigma News Gallery-Sigma introduces. http://www.sigmaphoto.com/html/news/Pixfs_28_300.htm (19. Oct. 2000)