Ultra-wide angle lenses tend to be huge and expensive. But, Canon’s widest full-frame mirrorless prime is also one of the company’s most affordable lenses. Beat in price by only the $199 nifty fifty, the Canon RF 16mm f2.8 STM sits at just $299. At under six ounces, it barely adds weight to the front of the camera. And, it’s an ultra-wide-angle lens that doesn’t have an equivalent in the EF mount.
But, where did Canon make cuts to create a wide-angle that’s simultaneously cheap and light? I spent some time capturing landscapes and environmental portraits with the Canon RF 16mm f2.8 STM to see what Canon has managed to cram into such a small $299 lens. Looking at the JPEGs, you’ll probably be impressed — but don’t look too closely at the RAW files.
Table of Contents
Too Long, Didn’t Read
Canon RF 16mm f2.8 Pros and Cons
Pros
Cons
Gear Used
Innovations
Canon RF 16mm f2.8 Tech Specs
Ergonomics
Build Quality
Autofocus
Ease of Use
Image Quality
Bokeh
Sharpness
Lens Character
Color Rendering
Extra Image Samples
Edited
Unedited
Conclusions
Likes
Dislikes
Too Long, Didn’t Read
The Canon RF 16mm f2.8 STM is a great affordable lens for JPEG photographers. But, the distortion will give RAW shooters and pixel peepers some pause.
Canon RF 16mm f2.8 Pros and Cons
Pros
Compact and lightweight
Affordable
Ultra-wide view
Bright aperture
Simple, clever design
Fast to focus
Cons
Significant vignetting, barrel distortion, and chromatic aberration on RAW files
Smudgy image quality at the edges, in both RAW and JPEG
Small points of light flare
No weather-sealing
Gear Used
I used the Canon RF 16mm f2.8 STM with both the EOS R3 and the EOS R6.
Innovations
This lens is the first ultra-wide prime to launch for the RF mount. Canon doesn’t even have a similar EF mount option on their current list of lenses, just the $2,099 EF 14mm f2.8L IS USM. Outside of that, the biggest headliners here are that it’s small and affordable.
Canon RF 16mm f2.8 Tech Specs
Canon USA lists the following specifications for the RF 16mm f2.8 STM:
Focal Length: 16mm
Maximum and Minimum Aperture: F2.8 – F22
Lens Mount Type: RF Mount; Metal Mount
Compatible Cameras: Canon EOS R-series, including full-frame
Minimum Focusing Distance: 5.1 in. / 0.43 ft. / 0.13m
Maximum Magnification: 0.26x
Field of View, at Minimum Focus Distance: Approx. 5.3 x 3.5 in. (134 x 90mm)
Angle of View (Diagonal): Approx. 108°10
Lens Construction: 9 elements in 7 groups
Special Elements: (One) Aspherical element
Lens Coating: Canon SSC (Super Spectra Coating)
Filter Size Diameter: ø43mm
Aperture Blades: 7; circular shape
Image Stabilization: None (with EOS R5 in-body stabilization – 5.5 stops correction)
Focusing Drive System: Canon STM (Stepping motor; gear-type)
Full-time Manual Focusing: Yes (after One-Shot AF; after Servo AF with compatible EOS R-series cameras)
Dual Pixel CMOS AF Coverage (Horizontal x Vertical):
EOS R/RP — Approx. 88% x 100%
EOS R5/R6 — Approx. 90% x 100%
Face Detect + Tracking – Approx. 100% x 100%
Control Ring: Dual-function Manual focus ring / Control Ring (selected with switch on lens), No clicks when set to Control Ring function: Manual Focus Ring
Electronic ring system:
Full-time Manual focus possible
No physical limit to ring rotational angle
AF/MF Switch: None – focus mode selected in camera menu
MF/Control Ring Switch: Provided on lens barrel
Distance Scale: Yes (after One-Shot AF; after Servo AF with compatible EOS R-series cameras) Distance scale available in EVF or Live View LCD screen of compatible EOS R-series cameras
Distance Limiter Switch: None
Dust / Weather Resistant Construction: None
Maximum Outer Diameter x Length: Approx. 1.6 in. x 2.7 in. (40.1 x ø69.2mm)
Weight: Approx. 5.8 oz. / 0.4 lb. / 165g
Ergonomics
The Canon RF 16mm f2.8 STM is a tiny lens. It looked downright comical on the big body of the R3. Weighing a touch under six ounces, shooting with this 16mm feels almost like there’s no lens mounted at all. It’s easily a lens that you could carry all day....