Unveiled: A New Normal Lens, the Canon EF 50mm f/1.8 STM


Arguably the most versatile single focal length available, Canon has just introduced a new nifty fifty: the EF 50mm f/1.8 STM. Pairing its classic design with a sleeker profile and new autofocus motor, this optic is ideal for everyday shooting for both still and video applications.

This full-frame-compatible, EF-mount lens utilizes Canon's gear-type stepping (STM) autofocus motor to achieve quick, smooth, and near-silent focusing performance, which pairs with the Movie Servo AF system found in select DSLRs for precise continuous focusing in live view. In addition to the focusing operation, the new lens also features a more svelte profile compared to its predecessors, and measures just 2.7 x 1.5". Additionally, the focusing ring has been relocated for more intuitive handling, the lens mount is now made of metal for increased durability, and it accepts 49mm filters.

The fast f/1.8 maximum aperture pairs with the normal focal length to make this an ideal lens for portraiture, as well as for working in low-light conditions. Seven rounded diaphragm blades also contribute to a pleasing quality of bokeh for selective-focus imagery. Furthermore, optimized lens coatings have been applied to control lens flare and ghosting for more contrast-rich and color-neutral photos and movies.

The EF 50mm f/1.8 STM includes the new E-49 Lens Cap, and is also compatible with the optional ES-68 Lens Hood and 49mm Protect Filter.

  EF 50mm f/1.8 STM EF 50mm f/1.8 II
Lens Mount Canon EF Canon EF
Focal Length (35mm Equivalent) 50mm 50mm
Maximum Aperture f/1.8 f/1.8
Minimum Aperture Not specified by manufacturer f/22
Angle of View 46° 46°
Minimum Focusing Distance 14" / 35.6 cm 1.5' / 45 cm
Autofocus Motor STM; gear-type stepping motor Overall linear extension system with Micromotor
Magnification 0.21x 0.15x
Lens Construction Not specified by manufacturer 6 elements in 5 groups
Diaphragm Blades 7, rounded 5
Filter Ring Diameter 49mm 52mm
Dimensions 2.7 x 1.5" / 68.6 x 38.1mm 2.7 x 1.6" / 68.2 x 41.0mm
Weight 5.6 oz / 159 g 4.6 oz / 130 g


By any chance is the focus ring any wider? I currently have a problem with keeping gear rings on the orinigal for my follow focus.

While we have not seen it yet, the focusing ring [compared to the current lens] looks wider but more importantly is pushed back and not on the front rim of the lens barrel. This should vastly improve performance of gear rings.

Any word on the cost? Sounds exciting! 

Connor Cleveland wrote:

Any word on the cost? Sounds exciting! 

Nevermind. I clicked that big order now button. *face palms*