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Rent NowThe Sony FE 20mm f/1.8 G is an ultra-wide-angle prime lens designed for Sony’s full-frame E-mount mirrorless cameras, delivering a 94-degree angle of view well suited to landscape, architecture, astrophotography, and night sky photography. It’s part of Sony’s G-series lineup, offering near-GM levels of optical performance and build quality in a notably compact, lightweight package.
Optically, the lens offers a 20mm focal length with a maximum aperture of f/1.8, delivering sharp image quality and beautifully defocused backgrounds even wide open. The 14-element, 12-group optical design incorporates two advanced aspherical (AA) elements and three extra-low dispersion (ED) glass elements, suppressing chromatic aberration and delivering high corner-to-corner resolution with minimal distortion, while Sony’s Nano AR Coating helps eliminate flare and ghosting. A 9-blade rounded aperture diaphragm contributes to smooth, creamy bokeh, a hallmark of Sony’s G Lens series.
Autofocus is handled by dual XD (Extreme Dynamic) Linear Motors, delivering fast, smooth, and quiet focusing well suited to both stills and video work, including Sony’s Eye AF tracking even at this ultra-wide focal length. The lens includes a dedicated aperture ring with 1/3 EV stops from f/1.8 to f/22 plus an Auto setting, along with a customizable focus hold button and a focus mode switch, giving photographers direct, tactile control options on the barrel.
A standout feature is the lens’s close-focusing capability, with a minimum focus distance of 7.1-7.5 in. (18-19cm) depending on focus mode, yielding a maximum magnification of approximately 0.2-0.22x, giving it reasonably good close-up performance for an ultra-wide prime. Build quality includes a dust- and moisture-resistant design with a fluorine coating on the front element to repel water and grime, along with a metal lens mount; the 67mm filter threads do not rotate during focus. The lens measures approximately 2.9 x 3.3 in. (73.5 x 84.7mm) and weighs approximately 13.2 oz (373g), notably light and compact for an ultra-wide f/1.8 full-frame lens.
As a full-frame E-mount lens, the FE 20mm f/1.8 G delivers its full angle of view on Sony full-frame bodies while remaining compatible with Sony APS-C E-mount cameras at a narrower, 30mm-equivalent effective field of view.
Key Features
– 20mm f/1.8 ultra-wide-angle prime lens (G series) for Sony full-frame E-mount
– 94° angle of view
– 14 elements in 12 groups, including 2 AA elements and 3 ED elements
– Nano AR Coating and fluorine-coated front element
– Dual XD Linear Motor autofocus
– Dedicated aperture ring (f/1.8-f/22, 1/3 EV stops, plus Auto)
– Customizable focus hold button and focus mode switch
– Rounded 9-blade diaphragm
– Dust- and moisture-resistant construction
– Minimum focus distance of 7.1-7.5 in. (18-19cm); approximately 0.2-0.22x magnification
– 67mm filter thread (non-rotating)
– No image stabilization
– Compact, lightweight design (approximately 373g)
– Compatible with Sony full-frame and APS-C E-mount cameras
