Ongoing technological innovation at SIGMA’s Aizu Factory has also contributed to further enhancements in lens production. SIGMA gained this know-how when it developed such super wide angle zoom lenses as the SIGMA12-24mm F4.5-5.6 II DG HSM and SIGMA 8-16mm F4.5-5.6 DC HSM. To minimize astigmatism across the zoom range, SIGMA leveraged its extensive experience in reducing optical aberrations and designing advanced structural elements. As the f-number decreases, so does the depth of focus, making it extremely difficult to minimize spherical aberration, axial chromatic aberration, astigmatism and field curvature. To develop a large aperture zoom lens with a maximum aperture of F1.8, it was necessary to solve a variety of technical challenges. This lens features the latest SIGMA technologies to offer F1.8 throughoutthe zoom range and ultimate performanceĮxemplifying SIGMA’s design know-how and advanced production technologies, this innovative lens offers the highest level of craftsmanship. * For interchangeable lenses for digital SLR cameras (as of April 2013) This is a revolutionary lens that overturns preconceptions while expanding the range of photographic expression. These outstanding performance characteristics are especially apparent in an APS-C format camera, since it has a slightly greater depth of focus than a full-frame camera. Taking on the challenge of creating the world’s first* wide-aperture lens to offer an aperture of F1.8 throughout the zoom range, SIGMA has succeeded in creating a zoom lens that offers the same high optical performance of a fixed focal length lens.

To solve this decades-long dilemma, SIGMA proudly introduces the 18-35mm F1.8 DC HSM next-generation large-aperture APS-C format standard zoom lens for digital SLR cameras. On the other hand, photographers often need to change the angle of view to properly capture the scene that presents itself. The definitive large-aperture APS-C format standard zoom lens.Ī large-aperture fixed focal length lens is great for achieving expressive bokeh effects and enjoying ultra-high optical performance.

Image quality until now found only in a fixed focal length lens.

Sigma 18 35