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 TypeZoom Lens
Focal Length120-300mm
Mount TypeCanon EF, Nikon F
FormatFull Frame / FX
Compatible Format(s)35mm Film / Full-Frame Digital Sensor DSLR (APS-C Sensor)
Compatible with TeleconvertersYes
Zoom Ratio2.5x
Maximum Reproduction Ratio1:8.1
Optical Stabilization (Image Stabilization)Yes
Aperture Information
Aperture RingNo
Maximim Aperturef/2.8
Minimum Aperturef/22
Maximum Angle of View (Full frame or larger format)20.4° - 8.2°
Optical Information
Lens Elements23
Lens Groups18
Diaphragm Blades9
Extra-Low Dispersion Glass Elements2 FLD elements 1 SLD element
Focus Information
Built-in Focus MotorYes
Hyper Sonic Motor (HSM)Yes
Internal FocusingYes
Minimum Focus Distance2.50m
Distance InformationYes
Filter Information
Filter Size105mm
Accepts Filter TypeScrew-on
Physical Characteristics
Weather / Dust SealingYes
Mount MaterialMetal
Tripod CollarYes
Dimensions12.70 x 28.96cm
Other Information
Available in ColorsBlack

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

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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…



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

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