Sigma 105mm F2.8 EX DG macro lens now available

Posted by Diana Eftaiha on Jun 29, 2011 in Gear & Equipment | 1 comment

The Sigma 105mm F2.8 EX DG macro lens is a large aperture medium macro lens ideal for shooting the smaller things in our world that exist virtually unseen.

A macro lens is one which will focus on a subject close enough to render it "life-size" on the image plane in your camera. It also has a flat field front lens element so that it can shoot images of flat objects such as artwork or postage stamps and be tack sharp all the way across the image.

This Sigma 105mm F2.8 EX DG macro lens is ideally suited for taking pictures of insects or other small creatures, but it is also the perfect focal length for facial portraits rendering the best perspective of the human face. This greater distance also allows the photographer more flexibility in lighting the subject with natural light reflectors.

Three SLD (Special Low Dispersion) glass elements provide optimum color correction and sharpness throughout the entire range and a Super Multi-layer coating reduces flare and ghosting. A floating internal focus system enables a minimum shooting distance of 12.3 inches enabling ability to shoot with critical sharpness regardless of distance.

Sigma 105mm F2.8 EX DG macro lens main characteristics

Designed for use with full frame digital SLR cameras. May also be used with smaller APS-c size sensors with a corresponding effective increase in focal length to about 150mm with most cameras.
Focuses down to 1:1 magnification ratio at its closest working distance of 12.3 inches.
Extremely compact weighing only 16 ounces & measures only 3.8 inches long.
A lens hood, front & rear lens caps and carrying case are included with the lens.

Sigma 105mm F2.8 EX DG macro lens technical specifications

Lens Construction

11 Elements in 10 Groups

Angle of View

23.3º

Number of Diaphragm Blades

Mininum Aperture

f22/45

Minimum Focusing Distance

31 cm / 12.3 in

Working Distance

12cm / 4.7in

Filter Size (mm)

Maximum Magnifications

1:1

Dimensions
(Diameter x Length)

74 x 95 mm/3.1 x 3.7 in

Extended Dimensions

150 mm / 5.9 in

Weight

450g / 15.9oz.

Corresponding Mounts

Sigma	EX DG Macro
Nikon	D
Canon	EX DG Macro
Sony/Minolta	EX DG D Macro
Pentax	EX DG Macro
FourThirds	EX DG Macro

EX – EX Lens
DG – DG for Digital
Macro –
D – Distance Information Function

Depth of field of medium telephoto macro lenses is generally very shallow; however, Sigma, Canon and SONY mounts of this lens have a minimum aperture of F45 (or F22 for FOUR THIRDS or F32 for Nikon and Pentax mounts) for incredible depth of field.
Minimum Aperture: F45: CANON, SIGMA,SONY F32: NIKON, PENTAX F22: FOUR THIRDS
*Nikon Mount: NO built in motor lens: NOT compatible with D40, D40x, D60, D3000, D5000