Focal length 

45mm

Maximum and minimum aperture 

f/1.2 ~ f/16

Lens mount 

Canon RF mount (metal)

Compatible cameras 

Canon EOS R-series, including APS-C sensor models

Minimum focusing distance (approx.) 

1.5 feet / 17.7 in. / 0.45m

Maximum magnification 

0.13x

Field of view, at max. magnification 

10.4 x 6.9 in. (263 x 175mm)

Angle of view (diagonal) 

51° 20'

Optical design 

Lens construction 

9 elements, in 7 groups

Special elements 

(one) Aspheric element

Lens coating 

SSC (Super Spectra Coating)

Filter size (diameter) 

67mm Ø

Aperture blades 

9

Image Stabilization 

None

AF 

Focus drive system 

STM (Stepping motor; gear type)

Full-time Manual focusing 

Available

Floating focus system 

None

Approx. 100% x 100% (Whole Area subject detection); Approx. 90% x 100% (manual AF Area positioning) 

Exterior design 

Control Ring 

Available, with click-stops

Manual focus ring 

Available

AF / MF switch 

Available

Iris ring 

None

Lens Function button 

None

Distance scale

None

(electronic distance scale in viewfinder / LCD screen available, in red Shooting menu, on compatible EOS R-series cameras)

Distance limiter switch 

None

Dust- / weather-resistant construction 

None

Tripod collar on lens 

None