Sony FE 40mm f/2.5 G Full-Frame Prime Lens (SEL40F25GB.SYX)

With a bright f/2.5 maximum aperture and three aspherical elements, the Sony FE 40mm f/2.5 G delivers exceptional corner-to-corner sharpness in a remarkably compact, 173-gram body. This full-frame prime lens pairs a classic 40mm focal length with fast, precise dual linear motor autofocus, making it an outstanding choice for street photography, environmental portraits, and video work.

Overview

The Sony FE 40mm f/2.5 G is part of Sony's premium G series, engineered for full-frame E-mount mirrorless cameras. Its optical design comprises 9 elements in 9 groups, including three aspherical elements that effectively suppress spherical aberration and distortion. The result is high resolution across the entire frame, even wide open at f/2.5. A circular 7-blade diaphragm contributes to smooth, natural bokeh, while the lens's compact dimensions and light weight make it ideal for everyday carry and travel.

What stands out

• Fast f/2.5 aperture for low-light shooting and shallow depth of field
• Dual linear motors deliver quick, quiet, and accurate autofocus for stills and video
• De-clickable aperture ring enables silent, stepless aperture changes during video recording
• Customizable focus hold button and AF/MF switch for intuitive control
• Dust and moisture resistant construction for reliability in challenging conditions
• 49 mm filter thread accepts a wide range of filters

Technical details

• Lens Mount: Sony E-Mount (Full-Frame)
• Focal Length: 40mm
• Maximum Aperture: f/2.5
• Minimum Aperture: f/22
• Angle of View: 57° (Full-Frame)
• Minimum Focus Distance: 0.28 m (AF) / 0.25 m (MF)
• Maximum Magnification: 0.20x (AF) / 0.23x (MF)
• Optical Design: 9 elements in 9 groups (3 aspherical)
• Diaphragm Blades: 7, circular
• Autofocus System: Dual linear motors
• Image Stabilization: No (relies on camera body stabilization)
• Filter Thread Size: 49 mm
• Weather Sealing: Dust and moisture resistant
• Weight: 173 g

Our verdict

The Sony FE 40mm f/2.5 G is a superb everyday prime that balances optical excellence with portability. Its natural perspective, fast aperture, and refined controls make it a versatile tool for photographers and videographers who demand premium image quality without the bulk.