A little lens. A lot of possibilities.
Sigma 18–50mm
f/2.8 DC DN
An everyday zoom for APS-C cameras. Go from the scene around you to a closer portrait, with f/2.8 available throughout the range.
Loading lens geometry…
No adapter needed.
This guide covers the two mounts currently available in our simulator. Sigma also offers Fujifilm X and L-Mount versions. Mount versions are separate products.
Less to carry.
More room to explore.
A useful starting point if you want one lens for a walk, a weekend away, or a meal with friends. The zoom lets you change the composition without changing lenses.
At the long end, try f/2.8 for subject separation. Stop down when you want more of a scene in focus. Our simulator lets you explore that tradeoff before choosing a lens.
An educational guide based on published specifications, not a hands-on review. The simulator does not measure autofocus, sharpness or lens-specific bokeh.
Illustrative library scenes, not photographs taken with this lens. Scene framing limits apply.
Know what’s
in your bag.
The 3D model uses our simulator geometry, with published outer dimensions and schematic internal parts.
Specifications checked September 15, 2026.
Sigma specifications ↗
- Focal length
- 18–50mm
- Maximum aperture
- f/2.8 throughout the zoom
- Sensor coverage
- APS-C
- Filter thread
- 55mm
Think about your subjects
18–50mm covers a practical everyday range. For distant wildlife or sport, compare a longer lens. For interiors where you cannot step back, compare a wider option.
Check your camera’s format
This is an APS-C lens. A compatible full-frame body uses a cropped image area, with reduced resolution. Match the mount before buying.
About adapters
No adapted combinations are verified in this guide yet. Choose the native version for your camera, and check Sigma’s compatibility information for model-specific details.
Check with Sigma ↗A few useful answers.
Does f/2.8 change as I zoom?
No. The maximum aperture remains f/2.8 across the 18–50mm range.
Does this lens fit every Sony or Canon camera?
No. Choose Sony E for E-mount cameras or Canon RF for EOS R cameras. This lens is designed for APS-C coverage. It is not a native fit for Canon EF, EF-M or Sony A-mount bodies.
Can the simulator tell me how sharp it is?
No. It estimates framing, depth of field and exposure. Use manufacturer information and independent hands-on testing to assess rendering, autofocus and optical quality.