Sigma 24-70 mm f/ 2.8 EX DG Macro Lens

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MTF-charts

Sigma 24-70 mm f/ 2.8 EX DG Macro MTF Chart

Optical design

Format: 35mm SLR

Type: Zoom lens

Focusing: Auto Focus (AF)

Lens mounts: Canon EF, EF-S, Canon EF, EF-S, Canon EF, EF-S, Canon EF, EF-S, Sony A / Minolta A, Sony A / Minolta A, Sony A / Minolta A, Sony A / Minolta A, Nikon F (FX, DX), Nikon F (FX, DX), Nikon F (FX, DX), Nikon F (FX, DX), Pentax K, Pentax K, Pentax K, Pentax K, Sigma SA, Sigma SA, Sigma SA, Sigma SA

First year of production: 2004

Optical design: 14 elements in 13 groups

User reviews (2)

Photos (6)

Tests (0)

Owners (5)

Views (12005)

Average price: $493

Specifications:

Focal length	Max. aperture	Min. aperture	Blades	Min. Focus (m.)	Filter Ø (mm.)	Weight (gr/oz)	Length (mm/in)
24mm - 70mm	f/2.8	f/32	9	0.4	82	700/24,7	115.5/4,5

Additional information:

The Sigma 24-70 mm f/ 2.8 EX DG Macro is an all-purpose zoom lens for 35 mm and APS-C digital cameras of major brands. It is a good variant in price-quality relationship.

Equivalent focal length on APS-C cameras: 38 mm.

Constant aperture of f/2.8 throughout the entire range of zooming.

At f/2.8 the image is soft and not very sharp at all focal lengths. From f/4.0 and especially from f/5.6 onwards the lens is quite sharp.

9-blade aperture. Nevertheless, blurring of out of focus areas is somewhat coarse.

The optical scheme includes aspherical lenses and SLD elements. Principal aberrations are well corrected. Chromatic aberration occurs only in very contrastive scenes.

The front lens of the Sigma AF 24-70 mm F2.8 EX DG MACRO does not rotate while focusing which enables the use of petal hood, as well as polarized and gradient filters. Manual adjustment of sharpness is possible at any time by turning the focusing ring.

Due to the absence of a hyper sonic motor AF drive the focusing itself is rather slow, with rather frequent focus hunting, especially in poor light conditions.

Color rendering is natural, colors are not saturated. Contrast is average.

At wideangle sharpness is good in the center and on the edges. There is a slight drop in resolution on the edges.

Vignetting is pronounced at f/ 2.8 and a focal length of 70 mm.

Barrel distortion is visible at 24 mm.

Side and back light is not handled well, so a hood is strongly recommended.

The tag Macro in the lens designation is rather relative. Macrography is possible with a maximum magnifying ratio of 1:3.8 only.

The Sigma AF 24-70 mm F2.8 EX DG MACRO is fit for all principal types of shooting especially on 35 mm sensors. It is limitedly fit for genre and candid photography due to mediocre functioning of the aperture at f/ 2.8 and rather slow autofocus.

Compatible hood: LH875-02,548

A soft carrying case and a petal hood are included with the lens.

Attention! Not all autofocus functions are available:

The lens version for the Pentax bayonet mount is not compatible with SF-series autofocus cameras.
The version for the Nikon bayonet mount is not compatible with D40, D40x, D60, D3000, D5000 cameras due to the absence of a built-in motor.

Links to online resources:

Posted by: Sergei Borodin Date of publication: 13.09.2010

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Autor: Psyduck

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Autor: Psyduck

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Mechanical quality	2.72	7
Optical quality	3.15	7
Usability	3.33	6
Pricing / Value	2.86	7
Bokeh	2.57	7
Overall lens rating	2.93

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Owner reviews: Sigma 24-70 mm f/ 2.8 EX DG Macro

JDRoest 26.12.2014 23:59:47

Period of use: 4 years

Strengths:

Built like a tank.

Weaknesses:

Not a good tank.

Can be used as a hammer.

Comments:

Used this for 4 years and although I loved it, it just wasn't wide enough on an APSC body.

Never really found it that sharp either which was annoying, but a 10MP body always masked that a little bit. Frankly, the 18-55 Canon kit lens was better.

The other problem with mine was that at 60k it properly failed. The lens quickly developed a mechanical focus isse and the aperture mechanism started freezing/jamming more and more.

Very disappointed in the end with this lens.

Comments (0)

Psyduck 1.1.2000 00:00:01

Period of use: 2 years

Strengths:

Good looks

Stable focusing accuracy

Good sharpness of the diaphragm 3.2

Price

Weaknesses:

2.8 is too soft

Weight, without the use of the battery pack and wrist strap is difficult

Zoom ring a little, but the focus ring is too big. It is better to be the opposite.

Hood is not effective, it allows a side flare

Comments:

In general, a good lens for its tasks. With proper sharpening can achieve interesting pictures on the open apertures. Used in the wedding photographies, an acceptable defect rate (with apertures 4.5-5.6, to open more at weddings was scary). Knowing the pros, cons and features of the lens, you still leave it for photography

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