This lens is an EF 28mm 1.8 USM

Features
Focal length and maximum aperture: 28 mm 1:1.8
Lens construction: 10 elements in 9 groups
Diagonal angle of view: 75°
Focus adjustment: Rear focusing system with USM
Closest focusing distance: 0.25m / 0.8ft
Filter size: 58mm
With the large maximum aperture, excellent background blur is possible
even with a fast shutter speed
The large maximum aperture makes excellent background blur possible even
with a fast shutter speed.
The aspherical lens element makes the lens compact and corrects
spherical aberrations.
The image is sharp even at the edges.
Photo Quote: I paint what cannot be photographed, that which comes from the imagination or from dreams, or from an unconscious drive. - Man Ray