Large Aperture, Standard Zoom with Optical Stabilization...
An upgrade to its predecessor, the 18-50mm F2.8-4.5 DC OS HSM is a lens dedicated to digital SLR cameras with APS-C size image sensors offering a large aperture and Sigma's Optical Stabilization.
Once again, Sigma has also engineered the built-in OS function, an anti-shake system, (for Sony and Pentax mount) allowing the photographer to see a stabilized image in the viewfinder. The combination of the large aperture of F2.8 and anti-shake function makes capturing exceptional photos in low light achievable, and the wide angle is wellsuited for indoor photography.
Two SLD (Special Low Dispersion) glass elements and three Aspherical lenses provide excellent correction for all types of aberrations. The Super Multi-LayerCoating reduces flare and ghosting. Designed with inner focusing and inner zooming systems, high image quality is assured throughout the entire zoom range.
The overall length of the lens does not change during focusing and zooming ensuring convenient handling. This lens has a minimum focusing distance of 11.8 inches (30cm) throughout the entire zoom range and a maximum magnification ratioof 1:4.1. The incorporation of HSM (Hyper Sonic Motor) ensures a quiet and high speed auto focus.
The Sigma 18-50mm is commonly used for Landscape/scenery, Low light, Weddings and more.The Sigma 18-50mm is most used by customers who consider themselves to be a Photo enthusiast, Semi-pro photographer among others.The Sigma 18-50mm is popular because customers like the following qualities of the Sigma 18-50mm: Consistent output, Durable, Easily interchangeable, Fast / accurate auto-focus, Lightweight, Strong construction to mention just a few.
Sigma 18-50mm Includes
Petal-Type Hood
Front & Rear Lens Caps
1 Year International Warranty plus 2 Year Sigma U.S.A. Extended Warranty (Total Warranty is 3 Years from Date of Purchase)
Customers most agreed on the following attributes:
Pros:
Easily interchangeable (9)
,
Fast / accurate auto-focus (9)
,
Lightweight (9)
,
Consistent output (8)
,
Strong construction (7)
,
Durable (6)
,
Rugged (3)
,
Nice bokeh (2)
,
Not too big of a lens (1)
Cons:
Lens creep (2)
,
Blurry focus (1)
,
Focus ring rotates in AF (1)
,
Poor in low light (1)
,
Slow focus (1)
Best Uses:
Landscape/scenery (7)
,
Weddings (7)
,
Low light (5)
,
Macro photography (2)
,
Night photography (2)
,
Sports/action (2)
,
Video (2)
,
General photpgraphy (1)
,
General portrait (1)
,
Walk around lens (1)
,
Wildlife photos (1)
Large Aperture/Wide Angle: Superior low light photos
High Image Quality: Two SLD glass elements and three Aspherical lenses corrects all aberrations
Includes: Petal-Type Hood
Mounts: Sigma, Nikon, Canon, Sony and Pentax
Sigma 18-50mm Specifications
Construction
16 Elements in 12 Groups
Angle of view
69.3 - 27.9 degrees
F stop range
f/22
Closest Focusing Distance
30 cm / 11.8 inches
Maximum Magnification
1:4.1
Filter Size
67mm
Dimensions (Length x Diameter)
Diameter 74mm X Length 88.6mm
Weight
395g / 13.9 oz
Notes
Number of Diaphragm Blades: 7 Pcs. * Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR cameras. * For Pentax mount, if the camera body does not support HSM, auto focus will not be available.
