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Sigma's 55 - 200mm F4 - 5.6 DC lens. Courtesy of Sigma, with modifications by Michael R. Tomkins. Sigma announces three new digicam lenses
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(Monday, March 15, 2004 - 19:03 EST)

Japanese optics manufacturer Sigma Corporation has today announced three new lenses designed for use with single-lens reflex digital cameras.

Two of the new lenses are particularly significant, because they mark the first lenses (indeed, the first products!) for the Four Thirds System that are manufactured by a company other than Olympus. The Four Thirds standard is currently backed by Olympus, Kodak, Fujifilm, Matsushita, Sanyo and Sigma - the latter three of whom joined in mid-February.

As we noted back at the start of the month, the new Four Thirds lenses are an 18-50mm f3.5-5.6 and 55-200mm f4-5.6, which on Olympus' E-1 digital SLR (currently the only Four Thirds camera available) would be equivalent to 36-100mm and 110-400mm respectively. The new 18-50mm lens accepts 58mm filters, weighs 250 grams / 8.7 ounces, and has a diameter of 67.5mm (2.6") along with a length of 62mm (2.5"). The 55-200mm lens has 55mm filter threads, a diameter of 71.5mm (2.8"), length of 87.1mm (3.4") and weighs 310 grams / 10.9 ounces.

A third lens announced by Sigma today is an 18-125mm F3.5-5.6 which will be offered in Sigma, Canon, Nikon and Pentax mounts. The lens accepts 62mm filters, and has dimensions of 70mm (2.7") diameter by 77.7mm (3") length. Pricing and availability for the three new lenses haven't yet been announced.

Original Source Press Release:

18-50mm F3.5-5.6 DC - Compact-Lightweight zoom lens for the "Four Thirds System (4/3 System)" Digital SLR Camera System standard.

Sigma Corporation is pleased to announce the launch of the new 18-50 mm F3.5-5.6 DC for the Four Thirds Digital SLR Camera System . This zoom lens was exclusively designed to suit the characteristics of digital SLR cameras. The image circle was designed to match the size of the image sensors of digital SLR cameras, and this produced a compact and lightweight lens. The use of aspherical lenses provides correction for various aberrations throughout the entire zoom range and produce high level of optical performance. 18-50 mm F3.5-5.6 DC lens has a minimum focusing distance of 25cm ( 9.8”) at all focal lengths and is capable of macro photography with a maximum magnification ratio of 1:3.5.

Sigma's 18 - 50mm F3.5 - 5.6 DC lens. Courtesy of Sigma, with modifications by Michael R. Tomkins.

* If Olympus E-1 digital cameras is used, the angle of view will be equal to 36-100mm focal length.

THE SPECIFICATIONS
Focal Length 18 - 50mm
Minimum Aperture F22
Lens Construction 8 elements in 8 groups
Angle of View 62° - 24.4°
Number of Diaphragm Blades 7 pcs
Minimum Focusing Distance 25cm (9.8")
Maximum Magnification 1:3.5
Filter Size 58mm
Lens Hood Bayonet Hood
Dimensions Diameter 67.5mm (2.6") x Length 62mm (2.5")
Weight 250 gr / 8.7 ounces

•  The appearance, specifications, and the like of the product are subject to change for improvement without notice.



55-200mm F4-5.6 DC - High-performance Telephoto Zoom Lens, designed for “Four Thirds System (4/3 System)” Digital SLR Camera System standard .

Sigma Corporation is pleased to announce the launch of the new 55 -200 mm F4-5.6 DC for the Four Thirds Digital SLR Camera System .

This compact telephoto zoom lens was exclusively designed for use with digital SLR cameras. The image circle was designed to match the size of the image sensors of digital SLR cameras that also allows compact body and lightweight. This remarkably compact high performance zoom lens is ideally suited to a wide range of subjects and lens has a m inimum focusing distance of 110cm (43.3”) and maximum magnification of 1:4.

Sigma's 55 - 200mm F4 - 5.6 DC lens. Courtesy of Sigma, with modifications by Michael R. Tomkins.

* If Olympus E-1 digital cameras is used, the angle of view will be equal to 110-400mm focal length.

THE SPECIFICATIONS
Focal Length 55 - 200 mm
Minimum Aperture F22
Lens Construction 10 elements in 9 groups
Angle of View 22.2° - 6.2°
Number of Diaphragm Blades 8 pcs
Minimum Focusing Distance 110cm (43.3")
Maximum Magnification 1:4.5
Filter Size 55mm
Lens Hood Bayonet Hood
Dimensions Diameter 71.5mm (2.8") x Length 87.1mm (3.4")
Weight 310 gr / 10.9 ounces

•  The appearance, specifications, and the like of the product are subject to change for improvement without notice.



18-125mm F3.5-5.6 DC - Exclusively Designed for use with digital SLR cameras and has 6.9 times high magnification zoom ratio

Sigma Corporation is pleased to announce the launch of the new 18-125 mm F3.5-5.6 DC.

This zoom lens was exclusively designed for use with digital Single-Lens Reflex (SLR) cameras and has 6.9 times high magnification zoom ratio. Image circle is designed to match the size of the image sensor of digital SLR cameras.

A Special Low Dispersion (SLD) and two pieces of aspherical glass elements produce high level of optical performance through the entire zoom range and also this has resulted in a compact, lightweight lens.

This lens has a minimum focusing distance of 50cm (19.6”) at all focal lengths and equipped with inner focusing system. Since the front of the lens does not rotate, “Petal-type hood” and a circular polarizing filter can be easily attached and used. This lens is also equipped with Zoom Lock Switch that eliminates “Zoom Creep”.

Sigma's 18 - 125mm F3.5 - 5.6 DC lens. Courtesy of Sigma, with modifications by Michael R. Tomkins.

* An image sensor element larger than those corresponding to APS-C cannot be used in digital cameras or 35mm SLR cameras. If such an element is used vignetting will occur on the picture surface.

THE SPECIFICATIONS
Focal Length 18 - 125 mm
Minimum Aperture F22
Lens Construction 15 elements in 14 groups
Angle of View 69.3° - 11.4°
Number of Diaphragm Blades 7 pcs
Minimum Focusing Distance 50cm (19.6")
Maximum Magnification 1:5.3
Filter Size 62mm
Lens Hood Petal Hood
Dimensions Diameter 70mm (2.7") x Length 77.7mm (3")
Mounts Sigma, Canon, Nikon (D), Pentax
Weight To be determined

•  The appearance, specifications, and the like of the product are subject to change for improvement without notice.

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