Sigma 18-50mm F3.5-5.6 DC
Launched November 2003


18-50mm F3.5-5.6 DC
Compact-Lightweight zoom lens designed to suit the characteristics of digital cameras.

Sigma Corporation is pleased to announce the launch of the new 18-50mm F3.5-5.6 DC. This zoom lens is exclusively designed to suit the characteristics of digital SLR cameras. The image circle is designed to match the size of the image sensors of digital SLR cameras. The lens is compact with a maximum diameter of 60mm (2.3”) and overall length of 67.5mm (2.6”) weighing only 245gr (8.6 ounces). It has a variable angle of view of 76.5°~31.7°. The use of aspherical lenses provides correction for various aberrations throughout the entire zoom range and produce high level of optical performance. The 18-50mm F3.5-5.6 DC lens has a minimum focusing distance of 25cm (9.8”) at all focal lengths and is capable of macro photography with a maximum magnification ratio of 1:3.5.

  • Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR cameras.
  • If Sigma SD9 or SD10 digital cameras are used, the angle of view will be equal to 30-85mm focal length. The angle of view varies depending on the camera.
Construction 8 Elements in 8 Groups
Focal Length 18-50mm
Maximum Aperture ƒ3.5-5.6
Minimum Aperture ƒ22
Field of View 76.5-31.7°
Minimum Focus Distance 25cm
Number of blades 7
Maximum Magnification 1:3.5
Zooming System N/A
Filter Size 58mm
Diameter 67.5mm
Length 60mm
Weight 245g
SRP at launch: £99.99
Available Mounts: Sigma AF, Canon AF, Nikon AF, Pentax