The Sigma 18-50mm F/2.8 EX DC Macro Lens features Minimum focusing distance of 20cm with a maximum magnification of 1:3, Aspherical lenses offer compact and lightweight construction, SLD and ELD glasses offer excellent correction of color aberrations, and a new optical design to minimize vignetting.
Sigma 18-50mm F/2.8 EX DC Latest Price
>> REVIEWS (last updated: 03.05.07)
PopPhoto reviews the Sigma 18-50mm F/2.8 EX DC and writes;
“As expected, SQF tests found sharpness and contrast in the Excellent range at all focal lengths…For tabletop shooters who like to reach out from the camera position to reposition or otherwise manipulate their subject, this 1:3 macro is probably the closest focusing lens in its class. In all, it’s a stellar performer, and significantly better by virtually all optical benchmarks than its predecessor, or, for that matter, competitors such as Nikon’s comparable 17-55mm f/2.8 ($1,200, street).”
PhotoZone reviews the Sigma 18-50mm F/2.8 EX DC and writes;
“Generally the Sigma AF 18-50mm f/2.8 DC EX macro delivered a solid performance but without being any better than the competition. The resolution results are generally very fine except at 18mm where the extreme border performance leaves something to be desired below f/5.6. Distortions as well as CAs are about in line with the rest of the gang. Typical for most dedicated APS-C lenses the vignetting could be a little better at wide-open aperture. The build quality and handling of the Sigma is fine. The Sigma offers lots of bangs for your bucks but the comparable Tamron AF 17-50mm f/2.8 SP seems to be a better alternative. “
>> SAMPLE PHOTOS (last updated: 03.05.07)
>> PRESS RELEASE
EX series large aperture zoom lens designed specially for use with digital SLR cameras with a minimum focusing distance of 20cm.
This lens has a large aperture of F2.8 throughout the entire zoom range, a minimum focusing distance of 20cm (7.9”) and a maximum magnification of 1:3, making it ideal for close-up photography.
Specially designed to suit the characteristics of digital SLR cameras this lens provides a high level of optical performance. Its design incorporates both glass-mold and hybrid aspherical lens technology which offers extremely high image quality as well as a compact and lightweight construction. Minimal vignetting and superior peripheral brightness is ensured.
Special Low Dispersion (SLD) and Extraordinary Low Dispersion (ELD) glass elements provide excellent correction of color aberrations. The super multi-layer lens coating reduces flare and ghosting, a common problem with digital cameras. High image quality is assured throughout the entire zoom range. An inner focusing system eliminates front lens rotation, making the lens particularly suitable for using the petal-type lens hood (supplied) plus circular polarizing filters.
Sigma 18-50mm F2.8 EX DC Macro Lens Specifications
Focal Length 18-50mm
Minimum Aperture F22
Lens Construction 15 Elements in 13 Groups
Angle of View 69.3°-27.9°
Number of Diaphragm Blades 7pcs
Minimum Focusing Distance 20cm (7.9”)
Maximum Magnification 1:3
Filter Size 72mm
Lens Hood Petal–type Hood
Dimensions Diameter 79mm (3.1in”) x Length 85.8mm (3.4”)
Weight 450gr /16.0oz
• DG UV72 mm 0085126 923747
• DG WIDE CIRCULAR PL72 mm 0085126 923853
• Lens Hood LH780-04 0085126 923624
SIGMA AF 0085126 581565
SONY AF 0085126 581343
NIKON AF 0085126 581596
PENTAX AF 0085126 581602
CANON AF 0085126 581541
FOUR THIRDS AF 0085126 581589
*Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR
See also: Lens Reviews | Sigma Lenses