CANON EF50mm f/1.8 STM Lens

  • Filter size : 49mm
  • Max aperture : f/1.8
  • With STM motor
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EF50mm f/1.8 STM

The third-generation of the internationally best-selling EF50mm f/1.8 series standard lens, the EF50mm f/1.8 STM, which has a body that includes a metallic mount, makes use of a stepping motor (STM) that ensures silent, speedy autofocus drive operation. The lens construction, consisting of 6 elements in 5 groups and a 7-blade circular aperture, has optimized lens coatings that suppress the occurrence of flare and ghosting, resulting in high image quality. With its lightweight, compact design that belies a surprisingly large diameter, this lens is convenient and easy to use for any scene, and allows for effortless taking of photos with a large, beautiful background blur.

  • Focal length and maximum aperture : 50mm 1:1.8
  • Lens construction : 6 elements in 5 groups
  • Diagonal angle of view : 46°
  • Focus adjustment : STM (Gear type), Full lens extension, full-time manual focus
  • Minimum focusing distance : 0.35m/ 1.15ft., 0.21x magnification
  • Filter size : 49 mm
  • Max. diameter x length, weight : ø 69.2 x 39.3mm, 160g/ 2.7” x 1.6 ”, 5.7oz.



Angle of View (Diagonal) 46°
Angle of View (Horizontal) 40°
Angle of View (Vertical) 27°
Closest Focusing Distance (m, ft) 0.35/1.15
Construction (groups elements) 5-6
Diameter x Length (mm) (Max.) 69.2 x 39.3
Distance Scale
Drive System Stepping Motor-gear drive
Filter Size (mm) 49
Max. Magnification (x) 0.21
Min. Aperture 22
No. of Diaphragm Blades 7
Anti-dust and Moisture Not Supported
Weight (g) (Approx.) 160
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