DT Lens Design
A more compact, lightweight lens designed specifically for the APS-size CCD imager used in the Sony (alpha) cameras.
Aspherical Lens Elements
To correct visual aberrations at wide-angle setting, enabling a lightweight lens to capture more visually accurate wide-angle shots.
ED (Extra-low Dispersion) Glass
To reduce chromatic aberration at telephoto extension, correcting certain wavelengths of light for sharp, clear images with well defined colors.
Because aperture blades form a near circle at the wide openings used for low-light shots, spot-light sources have a pleasing circular defocused effect.
Advisory when using DT lenses with full-frame (35mm equivalent) DSLR cameras.
Sony a (alpha) lenses with the Digital Technology (DT) designation are ideal for use on APS-C size DSLR cameras and are not recommended for use with full frame DSLR camera bodies (such as the DSLR-A900). Although DT lenses can be used with full frame cameras, they can only realize a maximum of 11MP image size (when using the DSLR-A900)., and are not guaranteed to provide accurate Auto Exposure performance.
Lens Type: Standard Zoom
Aperture (Max.): f/3.5 - 5.6
Aperture (Min.): f/22 - 36
Filter Diameter: 55mm
Lens Groups-Elements: 9 groups, 11 elements
Minimum Focus Distance: 1' 2.4" (38cm)
Aspheric Elements: 1 aspheric
Distance Encoder: Yes
Aperture Blade: 7 blades (Circular aperture)
Focal Length (35mm equivalent): APS: 27-105mm (35mm Equivalent: 18-70mm)
Lens Weight: 8.3 oz (235g)
Magnification: x 0.25
Weights and Measurements
Dimensions (Approx.): 2 5/8 x 3 1/8? (66 x 77mm)
Weight (Approx.): 8.3 oz (235g)