Sigma commitment to the L Mount Aliance will be significant with plans to launch no fewer than 11 L mount lenses (most likely to include all the Art series models recently released in Sony’s FE fitting), starting from the middle of 2019. There will be a new SD Quattro camera body which will have a full-35mm format sensor (with the Foveon multi-layer design) and, of course, use the L mount too. Sigma says it will discontinue its own SA mount on cameras, but will offer an SA-to-L adapter for the existing lenses. It will still make lenses in the SA mount however. It is also planning an EF-to-L adapter which will enable Canon’s D-SLR lenses to be used on the existing Leica SL body and Panasonic’s Lumix S1 and S1R L mount models when they arrive around mid-2019. The L mount will also be included in Sigma’s mount conversion service which already allows you to convert your lenses if you change camerra systems.
The new Sigma D-SLR lenses announced at Photkina 2018 are a 70-200mm f2.8 DG OS HSM Sports (in Canon EF, Nikon F and Sigma SA mounts), a 60-600mm f4.5-6.3 DG OS HSM Sports supertelephoto zoom (in the same three mounts), a 28mm f1.4 DG HSM Art (in Canon EF, Nikon F and Sony FE mounts), and a 40mm f1.4 DG HSM Art (for Canon, Nikon, Sigma and Sony). Also new is the 56mm f1.4 DC DN Contemporary fast prime for Sony E and MFT mirrorless cameras.
The new 60-600mm is the world’s first 10x optical telezoom lens with a telephoto end of 600mm. The optical construction comprises a total of 25 elements in 19 groups which includes three FLD types (“F” Low Dispersion) and one SLD type (Super Low Distortion). These special elements are designed to minimise chromatic aberrations. It incorporates an optical image stabiliser which Sigma says gives up to four stops of correction for camera shake. The minimum focusing distance ranges from 60 to 260 centimetres, giving a maximum reproduction ratio of 1:3.3 so this lens also has reasonable close-up focusing capabilities. On the outside the barrel is weather sealed and the external construction uses a variety of materials – including magnesium alloy and different composites – to help minimise weight without compromising structural integrity. The lens’s hood is also made from CFRP (carbonfibre-reinforced plastic) to further save weight. A fluorine coating is applied to the exposed surface of the front element to help better repel moisture and grease. The tripod mounting collar has an Arca-Swiss fitting, and other features include a focus limiter, a full-time manual focus override, a zoom lock and nine-blade diaphragm for smoother out-of-focus effects.
For more information about all Sigma’s new lenses unveiled at Photokina 2018 visit https://sigmaphoto.com.au