Sigma 28-70mm f/2.8 EX DG IF Aspherical

Last updated (11 April’13):
- Review by Photodo

The Sigma 28-70mm f/2.8 EX DG IF Aspherical features 28-70mm at focal length with maximum aperture of f/2.8. The lens construction has 14 elements in 12 groups and has diagonal angle of view at 75.4 degrees. Closest focusing distance at 0.33m and has a filter size of 67mm. The Sigma 28-70mm f/2.8 EX DG IF Aspherical lens weighs 18 Ounces and it measures 2.9 inches in diameter and 3 inches long.

Sigma 28-70mm f/2.8 EX DG IF Aspherical
Overall Rating: ★★★★☆

Expert Reviews

Sigma 28-70mm f/2.8 EX DG IF Aspherical Reviews

Photodo reviews the Sigma 28-70mm f/2.8 EX DG IF Aspherical and writes;
“As a fast and relatively lightweight lens for standard to short telephoto work, this lens has a lot going for it. Although small and light for it’s genre, it is well built, nicely torqued and felt right in use. The picture quality was good throughout and excellent when stopped down. The filter size is not so big that a mortgage is needed for filters and the supplied hood works well.”
rating: N/A

Popphoto reviews the Sigma 28-70mm f/2.8 EX DG IF Aspherical and writes;
“A sharp, compact, fast, and ruggedly constructed pro-caliber lens that’s priced for all users, Sigma’s newest 28-70mm f/2.8 is hard to fault.”
rating: N/A

The-digital-picture reviews the Sigma 28-70mm f/2.8 EX DG IF Aspherical and writes;
“Vignetting results are normal for lenses with specs similar to the 28-70 with full frame users noticing some corner darkening when shooting wide open. Like the Sigma 24-70, I find the Sigma 28-70 to overexpose by about .2 f-stops on average.”
rating: N/A

Ephotozine reviews the Sigma 28-70mm f/2.8 EX DG IF Aspherical and writes;
“With four hybrid aspherical elements and two Special Low Dispersion (SLD) elements in the construction, chromatic aberrations and distortions have been well controlled and I found no concerns on either score. Only slightly soft wide open, as the aperture closed down the lens produced very pleasing results and between f/8 and f/16 was in the area of razor sharp, especially at the wider end!”
rating: N/A

Features & Specifications

Sigma 28-70mm f/2.8 EX DG IF Aspherical Specifications

World’s smallest, lightweight, yet robust, large aperture zoom lens

* EX DG Lens Series; Designed to give an excellent performance with Digital SLR Cameras as well as 35mm Film Cameras.
* Super Multi Layer (SML) coating reduces ghost and flare.
* Two pieces of Special Low Dispersion (SLD) elements and four aspherical lenses provide high quality images throughout the entire zoom range.
* Minimum focusing distance of 13 inches (33 centimeters) at all focal lengths.

This is the world’s smallest, large and constant aperture zoom lens and is ideal for digital SLR cameras. The power layout of the lens is specially optimized for digital SLR cameras, and Super Multi Coating gives superb color performance whilst cutting down flare and ghost.

Two SLD elements and four aspherical lenses provide the ultimate correction against distortion as well as all types of aberration, especially spherical aberration. Its advanced optical design ensures high performance throughout the entire zoom range.

The use of aspherical lenses in the construction of this lens not only corrects aberrations but also produces a very small and lightweight lens design. Its compact, yet robust, construction has an overall length of 87.2 millimeters (3.4 inches), maximum diameter of 74 millimeters (2.9 inches), filter size of 67 millimeters and weight of 510 grams (18 ounces). It has a minimum focusing distance of 33 centimeters (13 inches) at all focal lengths and a maximum magnification ratio of 1:4.4 which is very convenient for close-up photography.

The inner focus system allows the lens to be focused without rotating the front element, therefore a Petal-type hood and circular polarizing filters can easily be used.

See also: Lens Reviews | Sigma Lenses

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