Sony FE 50mm f/2.5 G Lens Short Description The FE 50mm f/2.5 G Lens from Sony is characterized by its ultra-compact form factor. The versatile focal length suits shooting everything from street, portraiture, and documentary subjects, and it features an advanced optical design for well-corrected imagery with a high degree of sharpness and clarity. Additionally, the ultra-compact 2.7 x 1.8' form factor makes it effortless to have handy at any time.