Sony has introduced a set of compact full-frame E-mount prime lenses: the 24mm F2.8 G, 40mm F2.5 G and 50mm F2.5 G. All three lenses are the same size, almost the same weight, and the same price ($599).

The lenses all measure 64 x 45mm (2.5 x 1.8 in.) and weigh between 162-174 grams (5.7-6.1 ounces). They all use aspherical elements to maintain high resolution and reduce various aberrations, while the 24mm and 50mm lenses additionally use ED (extra-low dispersion) glass to reduce chromatic aberrations and fringing. The focus groups are driven by dual linear motors for silent and nearly instantaneous autofocus in our initial impressions.

Minimum focus distances range from 0.18m (7.1") for the 24mm to 0.31m (12.2") for the 50mm, but increase slightly when using autofocus. The 40mm and 50mm primes have higher magnification ratios at 0.23x and 0.21x, respectively, while the 24mm maxes out at 0.19x.

Design-wise, each lens has a physical aperture ring, which can be clicked or de-clicked, a linear-response manual focus ring, an AF/MF switch, and a customizable focus hold button. The filter diameter for all three is 49mm. Sony claims that these metal-clad (aluminum) lenses are weather and dust-resistant, and each lens comes with a rubber gasket seal around the lens mount. Accompanying lens hoods are included, with the 40mm and 50mm hoods containing their own 49mm front threads for attachment of filters.

The Sony FE 24mm F2.8, 40mm F2.5 and 50mm F2.5 trio will be available in mid-to-late May for $599 each.

Sony 24mm F2.8 / 40mm F2.5 / 50mm F2.5 specifications

 Sony FE 24mm F2.8 GSony FE 40mm F2.5 GSony FE 50mm F2.5 G
Principal specifications
Lens typePrime lens
Max Format size35mm FF
Focal length24 mm40 mm50 mm
Image stabilizationNo
Lens mountSony FE
Aperture
Maximum apertureF2.8F2.5
Minimum apertureF22
Aperture ringYes
Number of diaphragm blades7
Optics
Elements89
Groups79
Special elements / coatings1 ED + 3 aspherical elements3 aspherical elements1 ED and 2 aspherical elements
Focus
Minimum focus0.18 m (7.09)0.25 m (9.84)0.31 m (12.2)
Maximum magnification0.19×0.23×0.21×
AutofocusYes
Motor typeLinear Motor
Full time manualYes
Focus methodInternal
Distance scaleNo
DoF scaleNo
Physical
Weight162 g (0.36 lb)173 g (0.38 lb)174 g (0.38 lb)
Diameter68 mm (2.68)
Length45 mm (1.77)
MaterialsAluminum alloy
SealingYes
Filter thread49 mm
Hood suppliedYes