Name: 120-400mm f/4.5-5.6 DG HSM
Brand: Sigma
SKU: 682
Rating: 4.0 (8 reviews)

4.2

based on all reviews

really comfortable to use
excellent build quality and a good range of useful features
tolerates chromatic aberration very well

lacks a silent focusing motor
the plane of focus is not perpendicular to the optical axis
a lens-element which is not aligned

Elements: 21
Focus method: Rear
Autofocus: yes
Max format size: Full-frame (35mm)
Focal length: 120, 400 mm
Image stabilisation: no
Lens type: Telephoto

Sigma 120-400mm f/4.5-5.6 DG HSM - Pros & Cons

really comfortable to use
excellent build quality and a good range of useful features
tolerates chromatic aberration very well
The collar is very well made
detachable
Compatible with the Sigma APO Tele converters
excellent optical performer with Optical Stabilization and a high speed Hyper-Sonic Motor
focusing ring was well damped and very smooth to use

lacks a silent focusing motor
the plane of focus is not perpendicular to the optical axis
a lens-element which is not aligned
OS makes too much noise
image sharpness starts to worsen
No in-lens stabilization
light falloff is more of a problem
Sharpness is very poor at 300mm
rather expensive being and as such often limited to professional use
The front element does not rotate thanks to a rear-focusing mechanism
less light around missed shots of large birds in flight
the lens felt a little too heavy on the 400D
Lateral chromatic aberration was generally low
low-contrast subjects and in dim lighting
Vignetting was visible between 200mm and 400mm at apertures

Sigma - Video Reviews (1)

The Sigma 120-400mm F4.5-5.6 DG APO OS HSM

Sigma 120-400mm f/4.5-5.6 DG HSM - Full Specifications

Lens type	Telephoto
Lens mount	Sony/Minolta Alpha Pentax KAF3

Aperture max	4.5-5.6
Aperture min	22-28
Aperture ring	no
Number of diaphragm blades	9

Elements	21
Groups	15
Special elements / coatings	3 SLD elements
Zoom method	Expanding

Weight	57.85 oz
Diameter	3.62 in
Length	7.99 in
Filter size	3.03 in

Max Format size	Full-frame
Focal length	120 - 400
Maximum magnification	0.24 x
Image stabilisation	no

Focus method	Rear
Autofocus	yes
Autofocus motor type	Ring Type Ultrasonic
Full-time Manual focusing	yes
Closest focusing distance	1.5
Distance scale	yes
Depth of field (DoF) scale	no

Body materials	Metal
Tripod collar	yes
Hood supplied	yes
Sealing	no

Sigma 120-400mm f/4.5-5.6 DG HSM - Q&A

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Sigma 120-400mm f/4.5-5.6 DG HSM Sigma - Editorial Reviews (3)

4.4

Based on 3 reviews

Sigma 120-400mm f/4.5-5.6 DG HSM Sigma 120-400mm f/4.5-5.6 DG OS HSM APO Review

Imaging Resource

Published: 01.02.2008

Sigma 120-400mm f/4.5-5.6 DG OS HSM APO Review

Looking for a Sigma 120-400mm lens review? Read on to find out what we uncovered in our objective optical lab tests.

Sigma 120-400mm f/4.5-5.6 DG HSM Sigma 120 400mm f/4.5 5.6 DG APO OS HSM 35mm Zoom user reviews : 4.2 out of 5 - 1 reviews - photographyreview.com

Camera News and Reviews

Sigma 120 400mm f/4.5 5.6 DG APO OS HSM 35mm Zoom user reviews : 4.2 out of 5 - 1 reviews - photographyreview.com

Sigma 120-400mm f/4.5-5.6 DG HSM Sigma APO 120-400mm F4.5-5.6 DG OS HSM Lens

Photo Review

Published: 17.02.2012

Sigma APO 120-400mm F4.5-5.6 DG OS HSM Lens

4.4

A competitively-priced, optically-stabilised long-zoom lens for DSLR cameras with 'full-frame' or 'APS-C' sized image sensors.A close cousin to the APO 150-500mm F5-6.3 DG OS HSM lens, which has also been reviewed on the Photo Review website, Sigma's APO 120-400mm F4.5-5.6 DG OS HSM lens can be used on both 'full frame' and 'APS-C-sized' DLSR cameras as well as traditional 35mm SLRs. Smaller and lighter than the 150-500mm model, it is a significant upgrade on the 135-400mm f/4-5.6 lens it replaces.