Sony SEL20F28B.SYX E-mount 20mm f/2.8 fast brændvidde (sort)

With a bright f/2.8 maximum aperture, the Sony SEL20F28B.SYX captures crisp, low-light images while keeping the lens remarkably compact for everyday carry.

Overview

The Sony SEL20F28B.SYX is a 20mm prime lens engineered for APS-C format E-mount cameras. Its fixed focal length and wide 70° angle of view make it ideal for landscapes, street photography, and environmental portraits. The lens features a fast f/2.8 aperture for shallow depth of field and excellent performance in dim conditions. Three aspherical elements minimize spherical aberration and distortion, delivering sharp, high-contrast images across the frame. A 7-blade rounded diaphragm produces smooth, pleasing bokeh, while the internal focusing mechanism ensures fast, quiet autofocus—perfect for both stills and video.

What stands out

• Bright f/2.8 aperture for low-light shooting and creative depth of field
• Ultra-compact, lightweight design—easy to carry anywhere
• Three aspherical elements for outstanding sharpness and reduced aberrations
• 7-blade rounded diaphragm for beautiful bokeh
• Fast, silent autofocus with internal focusing
• 49mm filter thread for easy use with polarizers, ND, or protective filters

Technical details

• Lens type: Prime lens
• Mount: Sony E-mount (APS-C)
• Focal length: 20mm (35mm equivalent: 30mm)
• Maximum aperture: f/2.8
• Minimum aperture: f/16
• Angle of view (APS-C): 70°
• Minimum focus distance: 0.2 m (0.66 ft)
• Maximum magnification: 0.12x
• Optical design: 6 elements in 6 groups (3 aspherical)
• Diaphragm blades: 7, rounded
• Autofocus: Yes
• Image stabilization: No (relies on camera body stabilization)
• Filter thread size: 49 mm
• Color: Black

Our verdict

The Sony SEL20F28B.SYX is a superb wide-angle prime for E-mount shooters who value portability without sacrificing image quality. Its bright aperture, sharp optics, and compact build make it a versatile everyday lens.