Sigma 28-200mm f/3.5-5.6 DG ASPHERICAL IF MACRO

At the 200mm telephoto setting, the lens is capable of macro photography with a 1:3.8 maximum magnification. The minimum focusing distance is 48cm at all zoom settings. And with a photography magnification scale displayed on the lens barrel, the lens is user friendly.

A zoom lock switch mechanism is provided to prevent the lens from creeping due to its own weight, and to avoid the danger of the lens receiving a shock while it is being carried.

16 Elements in 14 Groups
Angle of View: 75.4 - 12.3 degrees
Number of Diaphragm Blades: 8 Blades
Minimum Aperture: F22
Minimum Focusing Distance: 48cm / 18.9 in.
Maximum Magnification 1:3.8
Filter Diameter: 62mm
Diameter x Length: 70mm x 77.7mm (2.76 in. x 2.96 in.)
Weight: 380g / 13.4 oz.
Corresponding AF Mounts: SIGMA, CANON, NIKON (D), MINOLTA (D), PENTAX

LEGEND

AF	Auto Focus
ASP	Aspherical lenses. Provides distortion-free images with image reproduction performance equivalent to that of a single focal length lens. Aspherical lenses allow the production of high-quality images from compact, lightweight telephoto zoom lenses.
DG	These are large-aperture lenses with wide angles and short minimum focusing distances. With an abundance of peripheral illumination, they are ideal lenses for Digital SLR Cameras whilst retaining suitability for traditional 35mm SLRs.
IF	Inner Focus. This lens moves the inner lens group or groups without changing the lens' physical length.

Comparison

by Slo-Foto.net
http://www.slo-foto.net/reviews-56-page1.html

Reviews

by Peter K. Burian, Shutterbug
http://shutterbug.com/equipmentreviews/lenses/0103sb_sigma/