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Sigma 18-250mm macro lens
Mark Peters : June 15th 2012 - 09:25 CET
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 Sigma 18-250mm F3.5-6.3 DC Macro OS HSM lens : Sigma, a manufacturer of some of the world's most impressive lines of lenses, cameras and external flash units, is proud to introduce the availability of the Sigma 18-250mm F3.5-6.3 DC Macro OS HSM lens starting in July 2012. The addition of the Sigma 18-250mm macro lens speaks to Sigma’s versatile product line-up with this multipurpose zoom lens that offers Optical Stabilization (Sony and Pentax mounts are not incorporated with OS function) and covers wide angle to telephoto to macro photography. It differs from Sigma’s current 18-250mm F3.5-6.3 DC OS HSM lens with its even more compact size, its macro capability with a maximum magnification ratio of 1:2.9 and the use of Thermally Stable Composite (TSC) material currently used only by Sigma.
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Sigma 18-250mm macro lens
Thermally Stable Composite, which is incorporated into the lens barrel and is often compared to polycarbonate, has a high degree of elasticity and exhibits little variation in its structure in extreme temperature conditions. This means that internal barrel expansion and contraction due to extreme temperature variations is less prevalent. Thermally Stable Composite also contributes to the lens’ size reduction. The non-macro 18-250mm F3.5-6.3 from Sigma without TSC weighs 22.2 ounces and is 3.1 by 4-inches in diameter, whereas the new Sigma macro lens is 16.6 ounces and 2.9 by 3.5 inches in diameter.
Sigma macro lens with 13x high zoom ratio
Sigma optimized this lens’ power arrangement by incorporating double-sided aspherical lenses and reexamining the design to achieve a more compact filter diameter. The Sigma 18-250mm macro lens has an approximate 13x high zoom ratio with a filter size of 2.8 inches in diameter. Sigma’s unique OS system, as well as one Special Low Dispersion (SLD) glass and three aspherical lens glasses, compensate for camera shake and enable correction of color aberration, respectively.
Sigma 18-250mm F3.5-6.3 DC Macro OS HSM lens
The new Sigma 18-250mm F3.5-6.3 DC Macro OS HSM lens is also equipped with Super Multi-Layer Coating to reduce flare and ghosting, a Hyper Sonic Motor (HSM) to ensure fast and quiet auto-focusing, and a rounded, seven-blade diaphragm to create an attractive round blur to the out of focus areas. The Sigma 18-250mm macro lens features a brass-made bayonet mount applied on the surface to reinforce strength for long-term use and enable high accuracy and solidity.
Sigma 18-250mm price & availability
This Sigma macro lens will be available in Sigma, Sony, Nikon, Canon and Pentax mounts, starting with Canon mounts coming in July, 2012. Pricing and all availability for other camera mounts have yet to be announced. |
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