For its first Art-series macro lens, Sigma is bucking the convention of using an inner focusing system for higher speed autofocusing. Instead, it’s opted for a focus-by-wire system without a mechanical connection between the focus ring and the focus drive system, which the company says improves image quality. Full-time manual focus is available during autofocusing.
The 70mm f/2.8 Macro is dust and weather resistant with nine rounded aperture blades that stop down to f/22. It has a minimum focusing distance of 10.2 inches and a 1:1 magnification ratio.
The lens is compatible with Canon’s chromatic aberration correction and will work with a macro flash accessory for shedding lights on your closeups. It will also work with Sigma’s 1.4x and 2.0x teleconverters. With the 1.4x attached, the lens can be used as a 98mm F4 mid-telephoto macro with autofocus functionality, while 2x allows the lens to be used as a 140mm F5.6 mid-telephoto macro with manual focus.
Pricing and availability of the new 70mm Macro wasn’t announced, but like all new Art lenses, it will be sold in Canon, Nikon, Sony E and Sigma mounts.
The new 105mm f/1.4 is packed with a larger than average number of lens elements to keep optical aberrations to a minimum and ensure the lens delivers razor sharpness and pleasing bokeh when shooting wide open.
The 105mm is dust and weather proof and the front lens element is coated to make it easier to clean. It has nine rounded aperture blades that stop down to f/16.
The lens hood is made from carbon fiber-reinforced plastic instead of ABS plastic and there’s a removable Arca-Swiss tripod socket. It will be sold in Sony, Canon, Nikon and Sigma mounts.