Sigma Announce 28-105mm F2.8-4 DG

Home • Reviews • Forums • News 2015 • 2013 • 2012 • 2009 • 2008 • 2007 • 2006 • 2005 • 2004
RSS Feeds • FOV Factor Table • Sensor Sizes | Definitions: A-D • E-H • I-L • M-P • Q-U • V-Z | Sitemap
Articles • Archived Websites (Pre-DigitalDingus): D100 Lounge • E-10 Club | Contact

Sigma Announce 28-105mm F2.8-4 DG

August 30, 2005

Sigma Corporation is pleased to announce the launch of the new 28-105 F2.8-4 DG lens. This large aperture standard zoom lens provides superior performance both for Digital SLR Cameras and 35mm Film SLR Cameras. This standard zoom lens covers frequently used focal lengths from 28mm to 105mm and allows a large aperture of F2.8 at the 28mm focal length. It is very convenient for a wide range of applications including snap shots, indoor photography. The new multi layer lens coating and lens design reduce flare and ghost, which is a common problem with digital cameras, and also creates an optimum color balance throughout the entire zoom range. The use of aspherical lens reduces various aberrations throughout the entire zoom range and improves optical performance. This lens has minimum focusing distance of 50cm (19.7 inches) throughout the entire zoom range and it has also maximum magnification of 1:5.5. Because the front of the lens does not rotate, circular polarizing filters and a petal-type hood can easily be used..

Features

New and most effective coating used for minimizing flare and ghost.
This standard zoom lens covers focal lengths from 28mm to 105mm and allows a large aperture of F2.8 at the 28mm focal length.
The use of aspherical lens reduces various aberrations and improves optical performance.

Sigma 28-105mm F2.8-4 DG
Focal Length	28-105mm
Minimum Aperture	F22
Lens Construction	12 Elements in 11 Groups
Angle of View	75.4 - 23.3degrees
Number of Diaphragm Blades	8
Minimum Focusing Distance	50cm (19.7”)
Maximum Magnification	1:5.5
Filter Size	72mm
Lens Hood	Petal Hood
Dimensions	Diameter 77mm (3”) Length 81mm (3.1”)
Weight	405g / 14.3oz