Sigma 18-50mm f/2.8 DC DN Contemporary (Canon RF)
Sigma

18-50mm f/2.8 DC DN Contemporary (Canon RF)

$599~
MSRP (prices vary)
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Released: September 21, 2023
18-50mm
Focal Length
f/2.8
Max Aperture
APS-C
Coverage
Stabilized
290g
Weight
52mm
Filter

Who the Sigma 18-50mm f/2.8 DC DN Contemporary (Canon RF) is for

The Sigma 18-50mm f/2.8 DC DN Contemporary (Canon RF) is an APS-C 18-50mm f/2.8 standard zoom for Canon RF.

Best for

  • Landscapes, interiors and architecture — a wide 18mm field of view.
  • Outdoor and travel use — a weather-sealed build.

How the Sigma 18-50mm f/2.8 DC DN Contemporary (Canon RF) compares to other Canon RF APS-C standard lenses

Every figure below is measured against the 6 Canon RF APS-C standard 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
Weight290g (10.2 oz)3rd heaviest of 6
Price (MSRP)$5992nd most expensive of 6
Maximum aperturef/2.8joint 3rd widest of 6

Being both among the fastest and among the heaviest here is physics rather than coincidence: an f/2.8 maximum aperture needs a larger front element and more glass behind it, which is where the 290g (10.2 oz) comes from.

What 18-50mm at f/2.8 actually gives you

18-50mm is wide enough to take in interiors, landscapes and architecture without the pronounced edge stretching of an ultra-wide. On the APS-C bodies it covers, it frames like 27mm would on full-frame.

f/2.8 held across the zoom range 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 290g (10.2 oz) it sits in the middle for handling: substantial enough to feel planted, light enough not to dominate the kit.

Maximum magnification is 0.5x, enough for close-up work on flowers or detail shots without reaching genuine macro reproduction. It focuses as close as 13cm.

Filters are 52mm — worth checking against what you already own, since polarisers and ND filters at this size are reusable across any other lens sharing the thread. A dedicated aperture ring gives direct control without going through a camera dial, which mostly matters for video work.

Autofocus, stabilisation and weather sealing

Autofocus is driven by an HLA 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.

The barrel is weather-sealed, so rain and dust are a manageable risk rather than a reason to pack up.

Full Specifications

Optical Design

Focal Length18-50mm
Lens TypeZoom
Optical Elements13
Optical Groups10

Aperture & Iris

Maximum Aperturef/2.8
Minimum Aperturef/22
Aperture Blades9
Rounded ApertureYes

Coverage & Angle

Format CoverageAPS-C
Lens MountCanon RF
Angle of View76° – 32°
35mm Equivalent29-80mm

Focus

AutofocusYes
Focus MotorHLA
Focus LimiterNo
AF/MF SwitchYes
Min Focus Distance13 cm
Max Magnification0.5x

Stabilization & Video

Optical StabilizationNo
Aperture RingYes
Declickable ApertureYes
ParfocalNo
Internal ZoomNo

General

Price (MSRP)$599
Filter Size52mm
Diameter65.4mm
Length76.9mm
Weight290g (10.2 oz)
Weather SealedYes
Tripod CollarNo

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