Sigma 18-50mm F2.8 DC DN
Sigma · 18–50 mm · f/2.8 · Contemporary
Score Breakdown
Scores combine our editorial testing with published lab data.
68
SCORE /100
What We Like
+Exceptionally compact and lightweight design at only 300g with constant f/2.8 aperture
+Fast and near-silent autofocus with excellent subject tracking thanks to optimized stepping motor
+Versatile 28.8-80mm equivalent focal range ideal for general photography and travel
+Sharp image quality across the frame with advanced optical design and in-camera aberration correction
+Weather-sealed mount with dust and splash-resistant construction for outdoor use
+Close focusing capability (12.1cm minimum at wide end) enables macro-style shots
Worth Knowing
−Significant barrel distortion at wide end, though corrected in-camera for JPEG but visible in RAW
−No built-in image stabilization (though body stabilization compensates on compatible cameras)
−Bokeh quality described as merely acceptable and somewhat raspy at wide open aperture
−Requires in-camera correction for optimal optical performance when shooting RAW
General | |
|---|---|
About This LensSigma's 18-50mm f/2.8 DC DN | C is the company's debut lens for the Canon RF mount. With its constant f/2.8 aperture, fast autofocus and weather sealing, this 29-80mm equivalent zoom virtually gives APS-C shooters a standard trinity lens – one that's about the size of a small tin of soda. Autofocus was fantastic, image quality looks great, and the lens remains very impressive despite its small size. It's a great little general purpose/travel lens, as it affords enough flexibility in the focal length to shoot many scenes, and the constant maximum aperture of F2.8 gives you more flexibility in different lighting situations. | |
| Brand | Sigma |
| Release Year | 2024 |
Production Status ⓘCurrent status of lens manufacturing (e.g., in production, discontinued). |  In Production |
Pro Branding ⓘSpecific branding codes used for professional-tier lenses. | Contemporary |
Lens Mount ⓘThe lens mount will tell you what type of lens range you can fit onto the camera body. Often the same camera company will have different lens ranges for different cameras. | Canon RF |
System ⓘIndicates which camera system the lens is designed to attach to. | Canon EOS R |
Maximum Format ⓘLargest sensor size compatible with the lens. |  APS-C |
Physical86/100 | |
| Lens Weight | 300 g |
Lens Diameter ⓘWidth of the lens at its widest point | 69.2 mm |
Lens Length ⓘHow long the lens is from front to back. | 74.5 mm |
Front Filter Compatible ⓘSome lenses are compatible with front filters, some are compatible with back filters and some are compatible with both. Front filters are usually more convenient to add and remove. |  Yes |
Front Filter Size ⓘDiameter of attachable filters. | 55 mm |
Optics77/100 | |
Focal Range ⓘShortest to longest focal length of the lens (zoom range start - end ) | 18–50 mm |
Aperture Range ⓘLargest aperture at the lens's shortest focal length to longest focal length (aperture range start - end) | 2.8 |
| Focal Length Angle of View | 73.4°–30° |
Flange Focal Distance ⓘDistance from lens mount to sensor. | 20 mm |
Diaphragm Type ⓘStructure and design of the aperture |  Automatic |
Blades ⓘNumber of diaphragm blades in aperture | 7020 |
Zoom Lens ⓘZoom allows you to vary the focal length, change between long shots and close-ups |  Yes |
Zoom Mechanism ⓘSystem enabling zoom function |  Manual |
Zoom Ring ⓘIf zooming is adjusted using a zoom ring |  Yes |
Zoom Type ⓘThe design or approach to zooming |  Rotary |
Closest Focusing Distance ⓘMinimum distance for a subject to be in focus. | 12.1 cm01500 |
Maximum Magnification ⓘLargest size a subject can be reproduced | 0.36x |
| Autofocus Mode |  Yes |
| Manual Mode |  Yes |
| Manual Focusing Ring |  Yes |
Features32/100 | |
Weather Sealing ⓘWeather sealing capabilities will give you more confidence when shooting in unfavourable conditions. |  Yes |
Fluorine Coating ⓘCoating to repel water and oil from lens elements. | No |
| Built In Lens Hood | No |
| Lens Hood Type |  Petal |
Zoom Lock ⓘZoom lock allows the zoom ring to be locked at the desired focal length | No |
Teleconverter ⓘA teleconverter (extender) is an extra piece of equipment that fits between the lens and the camera body to enhance magnification | No |
| Image Stabilization | No |
Construction54/100 | |
Elements ⓘLens elements refer to individual pieces of glass within the lens. | 13 |
| Groups | 10 |
Aspherical Elements ⓘThe number of aspherical lens elements which can help correct aberrations such as spherical aberration. | 3 |
Bi Aspherical Elements ⓘElements with two non-spherical surfaces | 0 |
Low Dispersion ⓘElements that reduce chromatic aberration | 1 |
Super Low Dispersion ⓘAdvanced elements further reducing chromatic aberration | 0 |
CA Reduction ⓘBuilt-in features to reduce chromatic aberration | 0 |
Internal Focusing ⓘInternal Focusing means that the lens does not change in size during focusing, and the front element does not rotate. |  Yes |