SIGMA has released the 17-40mm f/1.8 DC Art lens, a constant aperture zoom designed for APS-C mirrorless cameras. The lens covers a 25.5-60mm equivalent focal length range (27.2-64mm on Canon RF mount), and maintains f/1.8 throughout the zoom range. Let’s take a closer look. The lens uses 17 elements arranged in 11 groups, incorporating four aspherical elements and four Special Low Dispersion (SLD) elements. This configuration addresses chromatic aberrations and reduces flare and ghosting. The 11-blade rounded diaphragm contributes to circular bokeh rendering. According to SIGMA, the optical performance matches their 18-35mm f/1.8 DC HSM Art lens. The constant f/1.8 aperture and 11-inch minimum focusing distance across the zoom range provide a maximum magnification of 1:4.8 at 40mm. This lens represents SIGMA’s third constant f/1.8 zoom lens, following the 18-35mm f/1.8 DC HSM Art and 50-100mm f/1.8 DC HSM Art lenses for APS-C cameras. SIGMA 17-40mm f/1.8 DC Art. Credit: SIGMA Size and Weight Reduction Compared to the 18-35mm f/1.8 DC HSM Art, the new lens achieves a weight reduction of over 30% at 535g while extending the focal range. The lens uses a 67mm filter thread, one size smaller than its predecessor, and measures 72.9mm × 115.9mm. Video-Focused Design The lens features internal zoom mechanics, maintaining consistent length during operation for gimbal compatibility. Focus breathing suppression aims to reduce focal length shifts during focus pulls. The High-speed Linear Actuator (HLA) autofocus system operates quietly for video recording. Two customizable AFL (Auto Focus Lock) buttons are positioned on the lens...
Published By: CineD - Yesterday