The Sigma 17-50mm f/2.8 EX DC HSM Zoom Lens for Sony DSLRs with APS-C Sensors is a versatile, lightweight, and compact lens designed specifically for Sony A-mount and Minolta digital SLR cameras with APS-C size sensors. The lens has a fast f/2.8 maximum aperture throughout the entire zoom range and its 35mm focal length equivalency is 25.5 - 75mm. It features a construction of 17 elements in 13 groups with glass that corrects for aberrations and multi-layered lens coating to minimize flare and ghosting. It produces high contrast, sharp images throughout the zoom range even at its maximum aperture.
This lens is equipped with Sigma's Hyper-Sonic Motor (HSM) which provides fast and quiet auto focusing, which is ideal when shooting video.
This Sigma 17-50mm f/2.8 lens does not contain the OS (Optical Stabilization) designation because Sony Alpha DSLR's equip their camera bodies with image stabilization technology.
| Performance | |
|---|---|
| Focal Length |
17 - 50 mm Comparable 35mm Focal Length: 25.5 - 75 mm |
| Aperture |
Maximum: f/2.8 Minimum: f/22 |
| Camera Mount Type | Sony Alpha, Minolta AF |
| Format Compatibility | DSLR (APS-C Sensor) |
| Angle of View | 72.4° - 27.9° |
| Minimum Focus Distance | 11" (27.94 cm) |
| Magnification | 0.2x |
| Maximum Reproduction Ratio | 1:5 |
| Groups/Elements | 13/17 |
| Diaphragm Blades | 7 |
| Features | |
|---|---|
| Image Stabilization | No |
| Autofocus | Yes |
| Tripod Collar | No |
| Physical | |
|---|---|
| Filter Thread | 77 mm |
| Dimensions (DxL) | Approx. 3.3 x 3.6" (8.38 x 9.14 cm) |
| Weight | 19.93 oz (565 g) |