Canon · RF

RF 16mm F2.8 STM

Released October 2021

A compact full-frame RF ultra-wide prime with f/2.8 aperture, STM autofocus and close focusing to 0.13 m.

Mount
Canon RF
Focal length
16 mm
Max aperture
f/2.8
Stabilisation
No
Weight
165 g

What reviewers say

Both reviews praise the small size and low cost, while finding heavy dependence on digital distortion and shading corrections. Cameralabs enjoys its corrected images and versatility, despite focus breathing and softer wide-open corners. OpticalLimits is substantially more critical of corrected corners on EOS R5, finding more acceptable results on lower-resolution bodies. Both note audible autofocus and absent weather seals.

From opticallimits.com, cameralabs.com and cameralabs.com

Optics

Lens type
Prime
Focal length
16 mm
Maximum aperture
f/2.8
Minimum aperture
f/22
Optical construction
Nine elements in seven groups
Special elements
One aspherical element
Diaphragm
Seven blades

Mount and compatibility

Mounts
Canon RF
Image circle
Full frame
Compatibility
Canon RF mount, full-frame image circle; RF extenders and EF extension tubes not compatible

Focus and stabilisation

Autofocus
Yes
Minimum focus distance
0.13 m
Maximum magnification
0.26×
Optical stabilisation
No
Autofocus detail
STM autofocus and electronic manual focusing
Focus distance detail
Minimum focusing distance 0.13 m; inner barrel extends when powered and during focusing
Magnification detail
Maximum 0.26× reproduction
Stabilisation detail
No optical IS, per OpticalLimits and Cameralabs; compatible camera stabilisation is separate

Design

Dust and moisture resistant
No
Filter diameter
43 mm
Maximum diameter
69.2 mm
Length
40.2 mm
Weight
165 g
Controls
Combined focus/control ring and function switch; Cameralabs notes manual focus also needs selecting in camera settings
Filter detail
Only one filter at a time; Canon 250D/500D close-up lenses and PL-C B circular polariser not compatible
Weather resistance
OpticalLimits and Cameralabs report no weather sealing
Dimensions detail
Approximately 69.2 mm maximum diameter × 40.2 mm length, retracted
Weight detail
Approximately 165 g lens
Lens hood
EW-65C, sold separately
In the box
Lens, EF-43 front cap, RF lens dust cap and user manual kit
Release detail
October 2021 marketed month in Canon Camera Museum

Pros and cons

Pros

  • 165 g lens weight
  • 16 mm ultra-wide coverage
  • 0.13 m minimum focus distance

Cons

  • No optical stabilisation
  • No weather seals
  • Lens hood sold separately

Closest rivals

Model
MountFocal lengthMax apertureStabilisationWeightReleased
Canon RF28 mmf/2.8No120 gJul 2023
Canon RF24 mmf/1.8Yes270 gAug 2022
Canon RF14 mmf/1.4No578 gFeb 2026

Sources

  1. canon.co.uk/lenses/rf-16mm-f2-8-stm/specifications
  2. canon.co.uk/store/canon-rf-16mm-f2-8-stm-lens/5051C005
  3. global.canon/en/c-museum/product/rf510.html
  4. opticallimits.com/canon/canon-rf/canon-rf-16mm-f-2-8-stm
  5. cameralabs.com/canon-rf-16mm-f2-8-stm-review
  6. cameralabs.com/canon-rf-16mm-f2-8-stm-review/3

Photo: Canon Asia Photo Library; official press archive member RF16mm f2.8 STM.png; complete supplied canvas and native alpha retained.

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