N°349644 · Family detail
SonyPrime·SONY E mount
Sony FE G 40mm F/2.5
Specifications01
MountSONY E
Focal length40mm
Max aperturef/2.5
TypePrime
Weight173 g
Filter size49 mm
Physical length46.1 mm
Min focus distance0.25 m
Optical elements9
Groups9
Min aperturef/22
Sensor coverage43.3 mm
Additional Info02
ModelSEL40F25G
FormatFull Frame
SeriesPrime
SpecialG
Iris Blades7
Summary02
Sony E-mount 40mm prime lens with a maximum aperture of f/2.5 for standard use, including low-light and general photography. Compact fixed-focal design.
AI-assisted summary — verify against linked sourcesWhere can this lens be adapted?
The Sony E mount has a flange distance of 18 mm. A plain adapter fits a camera whose flange distance is at least 1.46 mm shorter. How lens adapters work
- Sony lenses named "E" (not "FE") cover APS-C only.
- Native lenses set the aperture, and often the focus, electronically. On a plain adapter they do not work. Use an electronic adapter made for this pair; for many pairs nobody makes one. Fully manual lenses are the exception.
- Sony ENative
- Nikon ZAdapter · 2 mm
No plain adapter reaches infinity focus on: Canon RF, Fujifilm X, L-Mount, Micro Four Thirds, Fujifilm G (GFX), Canon EF-M, Canon EF, Nikon F.

Other Mounts03
No alternate mounts are indexed for this family yet.