Sigma 24-70mm f/2.8 EX HSM DG IF Aspherical Lens

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The Lens is Heavy, Especially When Mounted on Smaller Bodies

Sigma 24-70mm f/2.8 EX DG HSM SLR Lens Boasting an improved optical design and a more compact size, Sigma has updated its 24-70mm f/2.8 zoom lens. Now it's an HSM version and it's smaller and said to be faster focusing via the Hypersonic motor (HSM). Rounded aperture blades produce pleasing bokeh (out-of-focus characteristics). The lens is available for Sigma, Canon, Nikon, Pentax and Sony DSLRs.

Sigma 24-70mm f/2.8 IF DG HSM EX Lens is a big aperture standard zoom that encompasses a reach from wide angle through short telephoto. It is just right for all around photography like portraits, snapshots, and landscapes. When mounted on a DSLR camera that employs an APS-C image sensor, the lens will present a 36-105mm equlavent focal length.

Sigma uses the DG label on their lenses with optical systems created to meet the operational traits of DSLR cameras. A Super Multi Layer Coat reduces flaring and ghosting, and uses SLD and ELD glass to provide excellent correction for all sorts of aberrations. A Hyper Sonic Motor (HSM) assures a silent, quick autofocus along with full-time manual focus capabilities.

Note! HSM lenses, although having the ability to manually focus on every Nikon F-mount DSLR camera, will not provide autofocus with some older SLR film AF cameras. This is the identical limitation to Nikon's very own AF-S lenses. Models that are Incompatible include: N55, N60, N6006, N8008/s, N4004, N5005, and N2020.

HSM means this lens will autofocus on Nikon D40/D40x, Nikon D60, Nikon D3000, Nikon D3100 and the Nikon D5000 DX Cameras

The lens is heavy, especially when mounted on smaller bodies such as a Canon Rebel. The Hood is quite shy for the focal ranges. The Large Diameter is difficult to grasp, especially with small hands. it's quite pricey for the lens being a non-OEM. Front-Focus continue to haunt Sigma. At 70mm at close focussing distances it consistently focus just ahead of the area you're attempting to focus on. After sending the lens to Sigma for repair, it was returned almost the same problem.  Sep 3, 2011

Features

The Sigma 24-70mm F2.8 EX DG HSM Lens. This large aperture standard zoom lens covers focal lengths from 24mm and is housed in compact construction.

The latest optical design provides an overall length of 94.7cm /3.7inch. It is ideal for general photography such as snapshots, portraiture and landscapes. The Super Multi Layer Coating reduces flare and ghosting. ELD (Extraordinary Low Dispersion) glass, two SLD (Special Low Dispersion) glass elements and three aspherical lenses provide excellent correction of all types of aberrations.

Superior optical performance is ensured throughout the entire zoom range. This lens incorporates HSM (Hyper Sonic Motor), ensuring a quiet and high speed AF as well as full time manual focusing capability. This lens has a minimum focusing distance of 38cm/15in and a maximum magnification ratio of 1:5.3.

The rounded 9 blades diaphragm creates an attractive blur. It is possible to attach the included petal-type hood to block out extraneous light.

Features:

Large aperture standard zoom lens ELD and SLD glass provides excellent correction of all types of aberrations Super Multi Layer Coating reduces flare and ghosting Equipped with HSM ensuring quiet and high speed AF The rounded 9 blade diaphragm creates an attractive blur

24-70mm F2.8 EX DG HSM specifications Focal length 24 - 70mm Angle of view 84.1-34.3 Maximum aperture F2.8 Minimum aperture F22 Lens Construction 14 elements/12 groups 1 ELD (Extraordinary Low Dispersion) glass 2 SLD (Special Low Dispersion) glass elements 3 Aspherical elements Number of diaphragm blades 9 (rounded) Minimum focus 38 cm (15 in) Maximum magnification 1 : 5.3 AF motor type Ring-type HSM (Hyper Sonic Motor) Full-time manual focus Image stabilization None Filter thread : 82 mm

Supplied accessories Petal-type lens hood Case

Optional accessories DG UV 82 mm DG WIDE CIRCULAR PL 82mm

Weight 900 grams. Dimensions 88.6mm diameter x 94.7mm length (3.5 x 3.7 in) Lens Mounts: Sigma, Canon, Nikon, Pentax, Sony. If you have the Cokin filter system, all you have to do is Best Prices for the 82mm adapter ring for $10.95 to adapt all your P system filters and you're all set. Street price $899.00


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Specifications
Overview
Lens styleZoom lens
Max Format Size 35mm FF  
Lens focal length24 70 mm  
Stabilization type No  
Camera mount Canon EF, Pentax KAF3, Sony Alpha, Sigma SA, Nikon F (FX)  
Angle of view 84.1 - 34.3 degrees  
Aperture (lens diaphragm)
Largest aperture opening F2.8  
Smallest aperture opening F22.0  
Includes aperture ring No  
Total diaphragm blades 9  
Aperture annotations rounded diaphragm  
Optical
Total Elements 14  
Number of Groups 12  
Coatings / special elements 1 ELD glass element 2 SLD glass elements 3 Aspherical elements  
Focusing
Minimum focus distance 0.38 m (14.96")  
Maximum magnification ratio 0.19 x  
Autofocus type Yes  
Lens motor Ring-type ultrasonic  
Full time manual focus Yes  
Focusing method Internal  
Lens distance scale Yes  
Depth of field scale Yes  
Physical features
Overall weight790 g (1.74 lb)  
Lens diameter 89 mm (3.49")  
Overall length 95 mm (3.73")  
Sealing No  
Zooming method Rotary (extending)  
Filter thread size 82 mm  
Filter annotations Does not rotate on focusing  
Lens hood included Yes  
Tripod collar included No
Introduced September 23, 2008


Lens Includes

Lens Hood
Front & Rear Lens Caps
Pouch Case
4-Year USA Warranty
1-Year International Warranty

Accessories

Video
Sigma 24-70mm F2.8 IF EX DG HSM


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