Sigma is continuing to expand its commitment to full-frame mirrorless, and the L Mount in general, with the launch of the 100-400mm f/5-6.3 DG DN OS Contemporary lens. This is the fifth lens from Sigma that has been specifically designed for the shorter flange-back distance of full-frame mirrorless camera systems, as opposed to SLR-intended lenses that have been adapted to mirrorless mounts, and brings with it an especially sleek form factor, lightweight design, and impressive optical qualities to suit the current crop of high-res cameras.
While it is available for Sony E-mount cameras as well, the Leica L version of this lens stands out as something unique for the fledgling mount. It's the first super telephoto for the L Mount, which is shared among Sigma, Leica, and Panasonic right now, and opens up new long-range shooting possibilities for these cameras. Despite it being a long-reaching, so-called "super" telephoto, it is also part of Sigma's Contemporary series of lenses, which means it also retains a modest size and weight for walk-around, handheld use.
In terms of optics, this 100-400mm has an array of low-dispersion glass that helps to reduce color fringing and chromatic aberrations throughout the zoom range, as well as realize accurate color and reduce flaring. Among other features, one of the most welcome will be the inclusion of optical image stabilization, which compensates for up to four stops of camera shake. This OS system can be used in conjunction with camera-based in-body image stabilization, too, for even more robust support to aid making sharp handheld images.
In terms of focusing, this lens follows the path laid by the 24-70mm f/2.8 DG DN and uses a stepping motor to enable quick and quiet AF performance for both photo and video needs. An integrated AFL button can be programmed to adjust various shooting settings from the lens, and a focus limiter switch also lets you constrain the focusing range for faster focusing within the specified range. Also, when working at the 400mm position, a minimum focusing distance of 5.2' is available for a 1:4.1 magnification ratio that suits headshot and other midrange shooting applications.
Other points worth noting: the 100-400mm has a rounded nine-blade diaphragm and a brass bayonet mount, and it is dust and moisture sealed at the mount to suit working in adverse conditions. Also, it is compatible with the optional TS-111 Tripod Socket if you're looking for a well-balanced means of working with this lens atop a tripod or monopod.
Beyond the lens itself, Sigma is announcing even more goods for L-mount shooters, including a pair of teleconverters and a newly designed USB Dock. The TC-1411 and TC-2011 1.4x and 2x teleconverters, respectively, allow you to extend the effective reach of a lens even further. When paired with the new 100-400mm, the T-1411 turns the lens into an effective 140-560mm f/7-9 and the TC-2011 produces an effective 200-800mm f/10-12.6 range. Both teleconverters fully maintain AF, AE, and OS functions as well as transfer Exif data. And, finally, Sigma is also releasing a UD-11 USB Dock for L-mount only, which will allow you to fine-tune some focusing settings and update the firmware of compatible lenses.
What are your thoughts on Sigma's new super tele zoom? What are your thoughts on the L Mount in general? Let us know, in the Comments section, below.
