Sigma 24mm f/1.8 EX DG lens

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Sigma 24mm f/1.8 EX DG
Sigma 24mm f1.8 EX DG.jpg
Key features
Maker: Sigma Corporation
Image stabilization: No No
Ultrasonic motor: n/a
Short back focus: n/a
Macro capable: Yes Yes
Unique features: Very fast maximum aperture
Application: low-light, landscape, macro, general purpose wide angle
Technical data
Type: wide angle lens
Focal length: 24 mm
Frame coverage: 84 degrees (FX or 35mm), 62 degrees ( DX or APS-C)
Aperture (max/min): f/1.8, f/22
Construction: 9 groups / 10 elements
Close focus distance: 18 cm
Max. magnification: 1:2.7
Max. diameter: 84 mm
Max. length: 82 mm
Weight: 485 g
Filter diameter: 77mm
Lens hood: included (bayonet)
Case: included (soft)
Angle of view
Horizontal: 73 degrees (FX or 35mm)/54 degrees (DX or APS-C)
Vertical: 54 degrees (FX or 35mm)/37 degrees (DX or APS-C)
Diagonal: 84 degrees (FX or 35mm)/62 degrees (DX or APS-C)
Retail info
MSRP US$ $450 (street price $340)

The Sigma 24mm f/1.8 EX DG is wide-angle lens which features a fast f/1.8 maximum aperture for use in low-light situations, and macro focusing capability to a reproduction ratio of 1:2.7. It uses aspherical lens elements. Though intended for 35mm film and full-frame digital SLRs, this lens is available for several makes of APS-C digital SLR cameras, where the angle of view is similar to a moderate wide-angle lens (in the 35mm-40mm range, depending on the size of the D-SLR sensor).

This lens is capable of macro photography, with minimum focusing down to 18cm/7.1" (reproduction ratio 1:2.7). It incorporates a floating focus system in order to minimize distortion, spherical aberration and astigmatism, and provides high performance at all shooting distances. The high reproduction ratio and wide angle of view allow capturing high quality images not only of a subject but also the surrounding scenery.


External links[edit]