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26 of 41 specs differ
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Pros Pros
  • Extremely compact and lightweight pancake design
  • Excellent sharpness and optical clarity
  • Durable build quality featuring a metal mount
  • Affordable price point
  • Smooth and accurate autofocus motor
Pros
  • Quiet, fast, and smooth STM autofocus
  • Improved build quality featuring a metal mount
  • Excellent sharpness and optical performance for the price
  • Compact, lightweight, and versatile handling
  • Attractive bokeh with seven rounded aperture blades
Cons Cons
  • Inconsistent or slow autofocus speed
  • Limited manual focus functionality
  • Audible autofocus noise during video recording
  • Noticeable vignetting at wide apertures
  • Lack of included lens hood
Cons
  • Strong vignetting and corner softness at wide apertures
  • Autofocus is not silent and can be slow
  • Bokeh quality can appear busy or smeared
  • Lack of weather sealing and basic construction
  • No included lens hood and non-standard filter size

Launch price Launch price $199 Launch price $129.99
Focal length & aperture Focal length & aperture 40mm f/2.8 Focal length & aperture 50mm f/1.8
Mount & coverage Mount & coverage Canon EF · Full-Frame Mount & coverage Canon EF · Full-Frame
Stabilization Stabilization None Stabilization None
Close focus Close focus 30 cm (0.18x) Close focus 35 cm (0.21x)
Filter thread Filter thread 52mm Filter thread 49mm
Autofocus motor Autofocus motor STM Autofocus motor STM
Weight & size Weight & size 130g (4.6 oz) · 68 x 22 mm (2.68 x 0.87 in) Weight & size 160g (5.6 oz) · 69.2 x 39.2 mm (2.72 x 1.54 in)

Announcement date Announcement date June 1, 2012 Announcement date May 11, 2015
Launch MSRP Launch MSRP $199 Launch MSRP $129.99
Lens mount Lens mount Canon EF Lens mount Canon EF
Image circle coverage Image circle coverage Full-Frame Image circle coverage Full-Frame
Lens type Lens type Prime Lens type Prime
Lens line / series Lens line / series EF Lens line / series —

Elements Elements 6 Elements 6
Groups Groups 4 Groups 5
Special elements Special elements 1 aspherical Special elements —
Coatings Coatings Super Spectra Coating Coatings —
Front fluorine coating Front fluorine coating No Front fluorine coating —

Focal length (wide) Focal length (wide) 40mm Focal length (wide) 50mm
Max aperture Max aperture f/2.8 Max aperture f/1.8
Minimum aperture Minimum aperture f/22 Minimum aperture f/22
Diaphragm blades Diaphragm blades 7 Diaphragm blades 7

Diagonal angle of view Diagonal angle of view 57° - 30° Diagonal angle of view 46°

Autofocus motor Autofocus motor STM Autofocus motor STM
Minimum focus distance Minimum focus distance 30 cm Minimum focus distance 35 cm
Maximum magnification Maximum magnification 0.18x Maximum magnification 0.21x
Focus mechanism Focus mechanism Internal focus Focus mechanism Extending barrel

Optical stabilization (OIS) Optical stabilization (OIS) No Optical stabilization (OIS) No

Aperture ring Aperture ring No Aperture ring No
AF/MF switch AF/MF switch No AF/MF switch Yes

Weight Weight 130g (4.6 oz) Weight 160g (5.6 oz)
Maximum diameter Maximum diameter 68mm (2.68 in) Maximum diameter 69.2mm (2.72 in)
Length Length 22mm (0.87 in) Length 39.2mm (1.54 in)
Filter thread Filter thread 52mm Filter thread 49mm
Weather sealing Weather sealing None Weather sealing None
Internal zoom Internal zoom No Internal zoom —
Tripod collar Tripod collar Not supported Tripod collar Not supported
Maximum extended length Maximum extended length 22.8mm Maximum extended length —

Lens hood Lens hood ES-52, optional Lens hood ES-68, optional
Teleconverter compatibility Teleconverter compatibility Not supported Teleconverter compatibility Not supported