Canon RF 28mm f/2.8 STM
Canon

RF 28mm f/2.8 STM

$299~
MSRP (prices vary)
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Released: September 29, 2022
28mm
Focal Length
f/2.8
Max Aperture
Full-Frame
Coverage
Stabilized
120g
Weight
43mm
Filter

Who the Canon RF 28mm f/2.8 STM is for

The Canon RF 28mm f/2.8 STM is a full-frame 28mm f/2.8 wide-angle prime for Canon RF.

Keep in mind

  • Aperture tops out at f/2.8 — less low-light headroom and background blur than faster lenses.

How the Canon RF 28mm f/2.8 STM compares to other Canon RF Full-Frame wide-angle lenses

Every figure below is measured against the 15 Canon RF Full-Frame wide-angle lenses in the catalogue, so you can see where this lens actually sits rather than reading its spec sheet in isolation.

SpecThis lensWhere it lands
Weight120g (4.2 oz)the lightest of 15
Price (MSRP)$299joint cheapest of 15
Maximum aperturef/2.8joint 6th widest of 15

Being both among the lightest and among the cheapest in its class usually means a simpler optical formula and a more modest maximum aperture — worth checking against the aperture row before treating it as a straight bargain.

What 28mm at f/2.8 actually gives you

28mm sits close to the way the eye takes in a scene, which is why this range tends to get used as a general-purpose focal length.

f/2.8 is the working standard for a fast lens — a stop or two of low-light headroom over a kit zoom, and noticeably more background separation.

Size, close focus and filters

At 120g (4.2 oz) it is light enough that it stops being a decision — the kind of lens that stays on the body or in the bag without thought.

Maximum magnification is 0.26x, enough for close-up work on flowers or detail shots without reaching genuine macro reproduction. It focuses as close as 19cm.

Filters are 43mm — worth checking against what you already own, since polarisers and ND filters at this size are reusable across any other lens sharing the thread.

Autofocus and stabilisation

Autofocus is driven by an STM motor.

There is no optical stabilisation in the lens, so handheld steadiness depends on the body having IBIS, or on keeping the shutter speed up.

Full Specifications

Optical Design

Focal Length28mm
Lens TypePrime
Optical Elements9
Optical Groups7

Aperture & Iris

Maximum Aperturef/2.8
Minimum Aperturef/22
Aperture Blades7
Rounded ApertureNo

Coverage & Angle

Format CoverageFull-Frame
Lens MountCanon RF
Angle of View75°
35mm Equivalent

Focus

AutofocusYes
Focus MotorSTM
Focus LimiterNo
AF/MF SwitchNo
Min Focus Distance19 cm
Max Magnification0.26x

Stabilization & Video

Optical StabilizationNo
Aperture RingNo
Declickable ApertureNo
ParfocalNo
Internal ZoomNo

General

Price (MSRP)$299
Filter Size43mm
Diameter69.2mm
Length24.7mm
Weight120g (4.2 oz)
Weather SealedNo
Tripod CollarNo

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