Sigma 120-300mm F2.8 DG HSM OS Lens
The Sigma 120-300mm f/2.8 DG HSM OS is a 120–300mm f/2.8 lens designed for Canon EF, Nikon F, Sigma SA mount cameras. Used copies start from $1,049.58 on GearFocus, with buyer protection on every purchase.
Sigma 120-300mm F2.8 DG HSM OS Lens
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Lens Overview — Sigma 120-300mm f/2.8 DG HSM OS
Key Features — Sigma 120-300mm f/2.8 DG HSM OS
120-300mm Telephoto Zoom: Covers a versatile telephoto range in a single lens, useful for sports and wildlife photographers who need to reframe quickly without swapping glass.
Constant f/2.8 Aperture: Maintains f/2.8 throughout the entire zoom range, keeping exposure and depth of field consistent as you zoom in or out.
Optical Image Stabilization: Built-in OS system compensates for camera shake, particularly beneficial when shooting handheld at 300mm.
HSM Autofocus: Hyper Sonic Motor delivers fast, quiet autofocus well suited to tracking moving subjects in sports and wildlife scenarios.
Full-Frame Coverage: DG designation confirms the optical design covers a full 35mm frame, with no vignetting on full-frame DSLR bodies.
Auto/Manual Focus Switch: Allows instant switching between autofocus and manual focus, giving shooters control in situations where AF may hunt or struggle.
Lens Specifications — Sigma 120-300mm f/2.8 DG HSM OS
| Spec | Detail |
|---|---|
| Use Cases | Sports, Wildlife, Portrait |
| Lens Type | Zoom |
| Format | Full Frame |
| Zoom/Prime | Zoom |
| Focal Length | 120–300mm |
| Maximum Aperture | f/2.8 |
| Camera System | DSLR |
| Lens Mount | Canon EF, Nikon F, Sigma SA |
| Autofocus | Yes |
| Focus Type | Auto, Manual |
| Image Stabilization | Optical |
| Filter Thread | 105mm |
Description — Sigma 120-300mm f/2.8 DG HSM OS
The Sigma 120-300mm f/2.8 DG HSM OS is a full-frame telephoto zoom lens designed for DSLR systems, spanning a focal length range of 120mm to 300mm. Its defining characteristic is the constant f/2.8 maximum aperture, which remains fixed throughout the zoom range — a key attribute for photographers who need reliable light gathering and depth-of-field control without compensating for aperture shifts. Built-in optical image stabilization helps manage camera shake, adding practical value at longer focal lengths.
The lens supports both autofocus and manual focus, offering flexibility depending on the shooting scenario. A 105mm filter thread accommodates large-format filters appropriate to this class of lens. At 3,390g, the lens is best paired with a sturdy tripod or monopod for extended sessions.
Mount options include Canon EF, Nikon F, and Sigma SA, making it accessible across the major DSLR platforms. The DG designation confirms full-frame sensor compatibility.
Pros — Sigma 120-300mm f/2.8 DG HSM OS
- ✓Constant f/2.8 maximum aperture across the full 120–300mm zoom range enables consistent exposure and shallow depth of field
- ✓Optical image stabilization helps reduce camera shake during handheld shooting
- ✓Broad mount compatibility covers Canon EF, Nikon F, and Sigma SA DSLR systems
Cons — Sigma 120-300mm f/2.8 DG HSM OS
- ✗Weight of 3,390g makes handheld shooting for extended periods physically demanding
- ✗105mm filter thread size means filters and accessories are large and expensive
- ✗Limited to Canon EF, Nikon F, and Sigma SA mounts — no native mirrorless mount options listed
Reviews — Sigma 120-300mm f/2.8 DG HSM OS
Videos — Sigma 120-300mm f/2.8 DG HSM OS
Sigma 120-300mm f2.8 Review: The Ultimate Sports Lens? — Tony & Chelsea Northrup