ProductIndex
Sigma 18-50mm F2.8 DC DN Contemporary Lens
One-line verdict
Compact constant f/2.8 standard zoom ideal for enthusiast APS-C shooters seeking portability and sharpness over image stabilization and extended reach.
How it compares
- vs Tamron 17-70mm F2.8 Di III-A VC RXD ($600–$700): Sigma 18-50mm wins on compactness, weight, and price, Tamron wins on zoom range (17-70mm vs 18-50mm) and built-in optical stabilization
- vs Sigma 16mm f/1.4 DC DN ($400–$500): Sigma 18-50mm wins on zoom versatility and everyday shooting flexibility, Sigma 16mm wins on maximum aperture and low-light/astrophotography performance
- vs Canon RF 85mm f/2 Macro IS STM ($550–$650): Sigma 18-50mm wins on zoom range and wide-end versatility, Canon RF 85mm wins on portrait compression, macro capability, and subject isolation
- vs Tamron 70-300mm F/4.5-6.3 Di III RXD ($500–$600): Sigma 18-50mm wins on aperture speed (f/2.8 constant) and low-light performance, Tamron wins on telephoto reach for distant subjects
AI-summarized review themes
Frequently Praised
- Exceptional sharpness center to edges wide open
- Ultra compact lightweight design enhances portability
- Fast quiet autofocus reliable for photos and video
- Excellent low light performance with constant f/2.8
- Close focusing distance enables macro-like shots
- Outstanding value upgrade from kit lenses
Frequently Criticized
- No optical image stabilization handheld low light challenging
- Limited zoom range to 50mm lacks telephoto reach
- Soft corners at wide end f/2.8
- Occasional autofocus hesitation during zoom video
Best for
Travel street everyday shooting, hybrid photo video, APS-C enthusiasts
Not for
Sports wildlife needing reach, handheld low light without IBIS, ultra wide landscapes
Specifications
| Spec | Value |
|---|---|
| Maximum Aperture | f/2.8 constant |
| Optical Image Stabilization | No |
| Autofocus Motor | Stepping motor |
| Focal Length | 18-50mm (27-75mm equiv. APS-C) |
| Minimum Focus Distance | 4.8” |
| Filter Size | 55mm |
| Weight | 290g |
| Length | 74.5mm |
| Mount Compatibility | Sony E, Fuji X, Canon RF, Nikon Z, L-mount (APS-C) |
| Weather Sealing | Dust/moisture resistant mount |
Data sources
- Estimated ~2000 purchase reviews via Amazon B&H
- Review period: 2021–2026
- Sentiment confidence: high