Metal mount with a new exterior design.
The lens is fully compatible with all full range of Canon DSLR Camera.
Digital era coating suppresses flaring and ghosting.
Lens construction (elements/groups): 6/5
By using STM (gear type), AF drive noise is quieter than the existing products DC motor.
By reducing the minimum focusing distance (45 cm -> 35 cm), maximum magnification is increased (0.15x -> 0.21x).
As a fixed, non-zooming lens the EF 50mm f/1.8 STM delivers great image quality -enhanced sharpness, more contrast, and less distortion.
Magnification w/ Extension Tube EF12 II:0.45-0.24. Magnification w/ Extension Tube EF25 II:0.74-0.53.