Sigma has announced a new superzoom lens for Canon, Nikon, Sigma, Pentax and Sony DSLRs. The Sigma 18-200mm f/3.5-6.3 II DC OS HSM features new FLD low dispersion glass elements and SLD (special low dispersion) glass elements, which should improve the overall image quality, as well as correcting chromatic aberration.
The is the second version of this lens. As a quick refreshers, the “DC” means that it is made for APS-C (aka “cropped”) sensors and not full frame DSLRs. The “OS” in the name refers to Optical Stabilization, which will be featured on all version except for Pentax and Sony DSLRs, which already include sensor-based image stabilization. “HSM” refers to Sigma’s hypersonic motor, which is an AF motor built into the lens. In my experience, Sigma’s HSM motors are make their lenses better with an overall improved AF speed and feel. The HSM AF motor also means that all Nikon DSLRs will be able to drive the AF system.
The new Sigma 18-200mm lens will carry a retail price tag of $720; however, there’s no word as to whether the Pentax and Sony versions will have a lower price tag due to the lack of Optical Stabilization. Additionally, Sigma’s MSRP figures are generally substantially inflated over the actual street prices once the products start shipping. Based on the prices of the current version of this lens, somewhere around $500 is probably a more realistic expectation for the new lens.
Sigma Press Release
The Sigma Corporation is pleased to announce the release of the SIGMA 18-200mm F3.5-6.3 II DC OS HSM. This 11.1x high zoom ratio lens is designed exclusively for digital SLR cameras, incorporates Sigma’s original OS (Optical Stabilizer) function and offers a broad shooting range from wide angle to telephoto.
The SIGMA 18-200mm F3.5-6.3 II DC OS HSM is the successor to the SIGMA 18-200mm F3.5-6.3 DC OS/ HSM which was launched in June 2007. The lens is ideal for travel photography with a compact construction and length of just 87.7mm. This lens features FLD (“F” Low Dispersion) glass elements, which have the performance equal to fluorite glass, and SLD (Special Low Dispersion) glass elements providing excellent correction of color aberration. Aspherical lenses give excellent correction for all types of aberration and distortion. The Super Multi-Layer Coating reduces flare and ghosting, ensuring high quality images throughout the entire zoom range. Sigma’s OS (Optical Stabilizer) system offers effective correction of approximately 4 stops, enabling easy handheld photography. HSM (Hyper Sonic Motor) ensures quiet, high-speed auto focus and the inner focus system eliminates front lens rotation, making the lens particularly suitable for using the supplied petal-type lens hood and circular polarizing filters. The rounded 7 blade diaphragm creates an attractive blur to the out of focus areas of images.
* Sony and Pentax mounts do not incorporate Optical Stabilization.
Specification (For Sigma mount)
- *Lens Construction:18 Elements in 14 Groups
- *Angle of View (for SD1):76.5-8.1 degrees
- *Number of blades:7 Blades (Rounded Diaphragm) *Minimum Aperture (Wide):F22
- *Minimum Focusing Distance:45cm/17.7in.
- *Maximum Magnification:1:3.8
- *Dimensions:Diameter 75.3mm×Length 87.7mm / 3.0in.×3.5in. *Weigh:490g (17.3oz.)
* FLD glass is the highest level low dispersion glass available with extremely high light transmission. The optical glass has a performance equal to fluorite glass which has a low refractive index and low dispersion compared to current optical glass. It also benefits from high anomalous dispersion. These characteristics give excellent correction for residual chromatic aberration (secondary spectrum) which cannot be corrected by ordinary optical glass and ensures high definition and high contrast images. * Vignetting will occur if the lens is used with image sensor larger than APS-C size or 35mm SLR, and APS Film SLR cameras. * For Pentax mount, auto focus will not be available on Pentax ist* series and K100D. * The appearance and specification are subject to change without notice.