Similarly priced to Nikon's own 70-300mm lens, is this third-party option any better?

Product Overview

Overall rating:

85%

Sigma 70-300mm f/4-5.6 DG OS

Overall score:85%
Image Quality:80%
Performance:85%
Value:85%
Features:90%
Design:85%

Pros:

  • Easy operation

Cons:

  • Noisy AF

Product:

Sigma 70-300mm f/4-5.6 DG OS Review

Manufacturer:

Price as reviewed:

£399.00

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This is the most expensive of three Sigma lenses that offer 70-300mm and an f/4-5.6 maximum aperture. For those on a tight budget, the £170 DG version may look appealing but it did not perform well when tested previously by WDC. The £230 Apo DG seems much more worthy of consideration and the version tested here adds image stabilisation to improve usability still further.

The Sigma employs a wide zoom-ring towards the middle of the lens and a forward-positioned manual focusing ring that rotates in AF mode, slightly restricting the grip that can be used when the lens is fully extended. There is a focused-distance scale and depth-of-field markings for the 70mm focal length. The AF/MF switch and the OS Off/On switch are at the rear of the lens.

Sigma’s Optical Stabilizer offers only a single mode but is effective and exceptionally quiet. The AF mechanism is a little noisy but at least it’s quick enough to capture most common subjects.
As is the case for other lenses with a forward-located focus ring, the reversible lens hood prevents manual focusing from being used below about 200mm. In addition, removing or fitting the lens hood makes the lens barrel rotate and this can be both inconvenient and disconcerting.

Sigma warns: ‘when you use the lens in rain or near water, keep it from getting wet,’ adding, ‘it is often impractical to repair the internal mechanism, lens elements and electric components damaged by water’. Use on the beach to photograph surfers during testing passed uneventfully so Sigma’s warning, albeit sensible, should not prevent careful use in a variety of environments.

MTF testing produced good results for the 70mm and 135mm focal-length settings but at 200mm there was an uncharacteristic dip in wide-aperture performance. Also, the lens narrowly failed to hit the critical 0.25 cycles-per-pixel level when set to its maximum focal-length, though this behaviour isn’t unusual for a lens of this type.

Sigma 70-30mm MTF graph

 

 

 

Sample images

Verdict

Overall, Sigma's lens performed very well and field testing suggests it loses nothing by offering only single-mode image stabilisation. At some £300 on-the-street, this looks rather a bargain.

Full Specification

Minimum Aperture:
f/22-32

Lens Mount:
Canon EF, Nikon F, Pentax K, Sigma, Sony Alpha
Filter Thread:
62mm

Image Stabilisation:
Yes
Focus Method:
AF, MF

Maximum Magnification:
1:3.9
Minimum Focus:
150cm

Number of Diaphragm Blades:
9
Lens Construction:
16 elements in 11 groups

Weight:
610g
Maximum Aperture:
f/4-5.6

Diagonal Angle of View:
34.3-8.2°
Dimensions:
76x124mm

Focal Length:
70-300mm
Maximum Format Size:
Full frame

  1. 1. Introduction
  2. 2. Sample images
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