10-20mm F4-5.6 EX DC lens allows enjoyment of super wide-angle
photography and it is a very powerful tool for indoor shooting and landscape
photography with APS-C size image sensors of digital SLR cameras.
Wide angle of view (102.4 ° at 10mm and 63.8 ° at 20mm) offers the
photographer greater freedom of expression. Three SLD glass elements are
employed for effective compensation of color aberration, which is a common
problem with super-wide angle lenses. One piece of glass mold and two hybrid
aspherical lenses, offer excellent correction for distortion, as well as all
types of aberration.
This lens is equipped with an inner focusing system. It has a minimum focusing distance of
24cm (9.4») at all focal lengths. The non-rotating lens barrel perfectly suits
the petal shaped lens hood. A circular polarizing filter can also be used
conveniently.
Specifications:
|
Lens Construction |
14 Elements in 10 Groups |
| Angle of View |
102.4 - 63.8 degrees (Sigma SD
format) |
| Number of Diaphragm Blades |
6 Blades |
| Minimum Aperture |
F22 |
| Minimum Focusing Distance |
24cm / 9.4 in. |
| Maximum Magnification |
1:6.7 |
| Filter Size |
Diameter 77mm |
| Lens Hood |
Petal Hood |
| Dimensions |
Diameter 83.5mm X Length 81mm
3.3 in. X 3.2 in. |
| Weight
Corresponding AF Mounts |
470g/16.6 oz.
Pentax |
