Sigma 120-300mm f/2.8 EX DG OS HSM

Sigma 120-300mm f/2.8 EX DG OS HSM

Lens Summary

Brand: Sigma

Also Known As: Sigma 120-300mm f/2.8 EX DG OS HSM

Lens Type: Zoom Lens

Format: Full Frame / FX

Focus: Autofocus

Lens Mount: Canon EF, Nikon F

Release Date: 2005-03-14

MSRP Price: $2499

Made in: Japan

Infrared Rating: Good

Production Status: In Production

Lens Description: The Sigma 120-300mm f/2.8 EX DG OS APO HSM AF provides a large constant f/2.8 maximum aperture at all focal lengths. In essence, it transforms a large-aperture 300mm f/2.8 lens into a zoom lens that allows you to determine the picture composition without having to change your vantage point. Optical image stabilization facilitates hand-held photography by allowing you to shoot at shutter speeds 4 stops slower than without the stabilization.

Sigma 120-300mm f/2.8 EX DG OS HSM Specifications

Lens Specifications
Lens Type Zoom Lens
Focal Length 120-300mm
Mount Type Canon EF, Nikon F
Format Full Frame / FX
Compatible Format(s) 35mm Film / Full-Frame Digital Sensor DSLR (APS-C Sensor)
Compatible with Teleconverters Yes
Zoom Ratio 2.5x
Maximum Reproduction Ratio 1:8.1
Optical Stabilization (Image Stabilization) Yes
Aperture Information
Aperture Ring No
Maximim Aperture f/2.8
Minimum Aperture f/22
Maximum Angle of View (Full Frame format) 20.4° - 8.2°
Optical Information
Lens Elements 23
Lens Groups 18
Diaphragm Blades 9
Extra-Low Dispersion Glass Elements 2 FLD elements 1 SLD element
Nano Coating No
Super Multi-Layer Coating No
Focus Information
Focus Autofocus
Built-in Focus Motor Yes
Hyper Sonic Motor (HSM) Yes
Internal Focusing Yes
Minimum Focus Distance 2.50m
Distance Information Yes
Filter Information
Filter Size 105mm
Accepts Filter Type Screw-on
Physical Characteristics
Weather / Dust Sealing Yes
Mount Material Metal
Tripod Collar Yes
Dimensions 12.70 x 28.96cm
Weight 2.95kg
Other Information
Available in Colors Black

Lens Construction

Sigma 120-300mm f/2.8 EX DG OS HSM Lens Construction

MTF Chart

Sigma 120-300mm f/2.8 EX DG OS HSM MTF Chart

Reader Interactions


  1. FrancoisR
    April 26, 2013 at 6:01 am

    At half the cost of Canon or Nikon 300 f2.8 (stabilised), this lens sure looks interesting (very heavy mind you). If the 300 f4 VR doesnt materialise any time soon, this could be an attractive alternative. Many claim very good performance.

    But wait Nasim! With the release of the new one with USB dock corfirmed for mid May, it would be a good opportunity to do a face off and see what Sigma has to offer. Maybe a good reason for once to go arftermarket…


    • Sohrab
      August 20, 2017 at 3:01 pm

      I bought one of these at a garage sale. This older version is NOT image stabilized as is stated in the specs. The later version is. I have to use a very fast shutter speed or a monopod or tripod. But, for the price I paid I can live with it to take baseball pics of the grandkids.

      • Al Parks
        March 24, 2019 at 4:43 pm

        There are three versions, the first was not stabilized (EX DG HSM), the latter two ARE (EX DG OS HSM, DG OS HSM S).

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