Sigma 28mm Macro DG F/1,8 EX Asp AF Lens
Sigma 28mm F/1.8 Lens is "EX", "DG" lens covers the minimum focus distance of 20
cm / 7.9 inches and has the highest magnification ratio 1:2.9. The opening in
Sigma 28mm F/1.8 lens, through which the light passes (aperture) is f1.8. The
number of interleaving blades to control the size of the aperture in the iris
diaphragm are 9 in order to capture desirable images.
The Lens embeds the floating focus system along with 2 a-spherical lens elements
to minimize distortion, spherical aberration and astigmatism. The lens
incorporates reduced vignetting optical construction in order to maintain
peripheral brightness with open aperture. For soft and calm autofocus the
"Internal focus system" is in business, which also eliminates lens rotation,
enables use of circular polarizer and lens hood. Dual-focus system in employed
in Sigma 28mm f/1.8 lens. Arsenic free ecological glass and lead are used in the
lens material. It is very convenient to handle Sigma 28mm f/1.8 Lens due its
compact design, light weight and automated focus system.
10-Element (s) / 9-Group
Angle view -Sigma
28mm f/1.8 Lens
F stop range
Closest Focusing Distance
20 cm / 7.9"
Maximum Magnification -Sigma
28mm F/1.8 Lens
Dimensions (Length x
83.5 x 80mm / 3.3 x 3.1"
Full Extended Length
88.9mm / 3.5"
Weight -Sigma 28mm Lens
480 g / 16.9 oz