The rear optical group of the lens contains 1 SD (Super-Low Dispersion) glass element to reduce the number of elements (pieces of glass) in the optical design in order to make the lens more compact, light-weight and faster focusing.
Specification
Mount availability:
Canon EOS, Nikon-D,
Focal length:
10 to 17mm
Maximum aperture:
f/3.5-4.5
Minimum aperture:
f/22
Optical construction:
10 elements in 8 groups
SD glass:
One elements
Coatings:
Multi-layer
Angle of view:
180° to 100°
Minimum focus distance:
5.5 in. (14 cm)
Reproduction ratio:
1:2.56
Zooming system:
Rotary type
Number of diaphragm blades:
6
Filter size:
N/A
Maximum outer diameter:
2.75 in. (70mm)
Dimensions:
2.75 in. (70mm) X L 2.79 in. (71.1mm)
Weight:
12.3 oz. (350g)
Lens Hood
Built-in