Jump to content

Sigma 24mm f/1.8 EX DG lens

From Wikipedia, the free encyclopedia
Sigma 24mm f/1.8 EX DG
MakerSigma Corporation
Technical data
Typewide angle lens
Focal length24 mm
Crop factor84 degrees (FX or 35mm), 62 degrees ( DX or APS-C)
Aperture (max/min)f/1.8, f/22
Close focus distance18 cm
Max. magnification1:2.7
Construction10 elements in 9 groups
Features
Short back focusn/a
Ultrasonic motorn/a
Lens-based stabilizationNo No
Macro capableYes Yes
Unique featuresVery fast maximum aperture
Applicationlow-light, landscape, macro, general purpose wide angle
Physical
Max. length82 mm
Diameter84 mm
Weight485 g
Filter diameter77mm
Accessories
Lens hoodincluded (bayonet)
Caseincluded (soft)
Angle of view
Horizontal73 degrees (FX or 35mm)/54 degrees (DX or APS-C)
Vertical54 degrees (FX or 35mm)/37 degrees (DX or APS-C)
Diagonal84 degrees (FX or 35mm)/62 degrees (DX or APS-C)
Retail info
MSRP$450 (street price $340) USD

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 18 cm/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.

The Lens was introduced in 2001.

References

[edit]
[edit]