An upgrade from the discontinued 135–400mm, it adds the silent HSM focusing motor, apochromatic design to minimize color aberration, and optical stabilizer. Good balance for a large lens.
Clearly a sibling to Sigma's larger 150-500mm f/5-6.3 OS lens, this full-frame tele zoom ($850, street) is almost the mirror image of that longer lens, but about 25 percent smaller. It replaces Sigma's 135-400mm f/4.5-5.6 in the lineup, and it's a significant upgrade for a number of reasons: It uses Sigma's silent HSM focusing motor, is compatible with Sigma teleconverters, and, of course, includes Sigma's Optical Stabilizer.
|Full-Time Manual Focus Override:||Yes|
|Minimum Focal Length:||120 mm|
|Maximum Focal Length:||400 mm|