New Lens Announcement: Sigma 18-250mm Macro with TSC material (more compact, 25% lighter)
Another rumor that was not unfounded! In a rare Friday announcement, Sigma has revealed a new lens, a new now-with-Macro version of their 18-250mm f3.5-6.3 DC OS HSM superzoom SLR lens, with a new more compact design, thanks to the use of Thermally Stable Composite (TSC) material, of which Sigma claims exclusivity among lens manufacturers. The Sigma press release describes the size benefits in this fashion:
"The non-macro 18-250mm F3.5-6.3 without TSC weighs 22.2 ounces and is 3.1 by 4 inches in diameter, whereas the new macro lens is 16.6 ounces and 2.9 by 3.5 inches in diameter."
If you do the math, it comes out to about 25% lighter: 22.2 - 16.6 = 5.6oz, divided by 22.2 oz = 25.45% lighter. A side-by-side comparison of the two lenses is provided by Sigma Global.
It will come out in the usual five SLR mounts, with Canon and Nikon first, and Alpha and K-mount in the next wave. The UK market has a price of 500GBP and the US market has a price of $500. It is available for pre-order at Adorama and B&H Photo (search for SI1825035M*, include the star/asterisk) which estimates the Canon version to be available June 26, 2012.
MTF charts are available at Sigma Japan.
Samples with SD15 DSLR
Samples! Sigma Global has published 16 real-world samples taken with the lens. All samples were taken with the Sigma SD15, so they may not be representative of 99% of photographers using non-Foveon sensors :) [SAMPLES!]