Sigma 105mm f2.8 EX DG OS HSM Macro Lens – Nikon F Mount

A classic for close-ups, the Sigma 105mm f2.8 EX DG OS HSM Macro Lens is a short-telephoto prime characterized by its ability to achieve a 1:1, life-size magnification along with a 1′ minimum focusing distance for macro applications. The optical design employs two SLD elements to virtually eliminate chromatic aberrations and color fringing throughout the focusing range for improved clarity and color rendering. A Super Multi-Layer Coating has also been applied for greater contrast when working in strong lighting conditions.

Key Features: Sigma 105mm f2.8 EX DG OS HSM Macro Lens

• Aperture Range: f/2.8 to f/22
• Two SLD Elements
• Super Multi-Layer Coating
• 1:1 Magnification, 1′ Minimum Focus
• Hyper Sonic Motor AF System
• Floating Internal Focus Design
• OS Image Stabilization
• Rounded 9-Blade Diaphragm

High performance telephoto macro lens with OS (Optical Stabilizer).

SLD glass provides good control of aberration and the floating inner focus system ensures high rendering throughout the focusing range. By using SIGMA’s APO Tele Converter, it is possible to take photos at greater than 1:1 magnification. HSM ensures a quiet and high speed AF as well as full-time manual focus override. This lens has a rounded 9 blades diaphragm which creates an attractive blur to the out of focus areas.

Large aperture medium telephoto macro lens

This medium telephoto macro lens allows you to maintain an appropriate distance from subjects while still getting close up photos. Since the working distance at its closest focusing position is 142mm, shadows of the lens and camera will not affect photography making it suitable for taking photos of subjects, such as flowers, under natural lighting conditions. In comparison to the Sigma 50mm and 70mm macro lenses, the main subjects can be defined with perfectly smooth and blurred backgrounds.

Floating inner focusing

The Sigma 105mm f2.8 EX DG OS HSM Macro Lens incorporates floating inner focusing which moves two lens groups separately. This minimizes aberrations which occur as shooting distance changes, and enables stable rendering of the image from infinity to 1:1 magnification. This also corrects image distortion, especially when taking close-up pictures. Since focusing does not change its overall length, this lens is easy to hold and use.

High rendering performance

The lens power layout produces excellent optical performance. High refractive index SLD (Special Low Dispersion) glass corrects chromatic aberration, spherical aberration and field curvature. It ensures high rendering performance at all shooting distances. The Super Multi-Layer Coating reduces flare and ghosting, maintaining quality images with high contrast.

Rounded 9 blades diaphragm

The Sigma 105mm f2.8 EX DG OS HSM Macro Lens has a rounded 9 blade diaphragm which creates an attractive blur to the out of focus areas. This also creates smooth, rounded out of focus highlights when taking photos which have a strong light source in the background such as lights shining on the surface of water.

Specifications of the Sigma 105mm f2.8 EX DG OS HSM Macro Lens

Focal Length	105mm
Maximum Aperture	f/2.8
Minimum Aperture	f/22
Lens Mount	Nikon F
Lens Format Coverage	Full-Frame
Angle of View	23.3°
Minimum Focus Distance	1.02′ / 31.2 cm
Maximum Magnification	1x
Macro Reproduction Ratio	1:1
Optical Design	16 Elements in 11 Groups
Diaphragm Blades	9, Rounded
Focus Type	Autofocus
Image Stabilization	Yes
Filter Size	62 mm (Front)
Dimensions (ø x L)	3.08 x 4.98″ / 78.3 x 126.4 mm
Length at Maximum Extension	4.85″ / 123.3 mm
Weight	1.6 lb / 725 g

For a more detailed specification about the Sigma 105mm f2.8 EX DG OS HSM Macro Lens see here. For more Sigma Lenses see here.