Sony DSLR-A100K - alpha; Digital Single Lens Reflex Camera Selection Manual page 6

Zoom Lenses
SAL24105
24-105mm F3.5-4.5
• Lens groups/elements: 11/12
• Minimum focus: 19-11/16" (0. m)
• Filter diameter: 62 mm
• Size: (diameter x length): 2-13/16
x 2-11/16" (71 x 69 mm)
Aspherical lens
• Weight: 13.9 oz (39 g)
Extremely compact zoom lens that covers a broad range
of focal lengths from wide-angle to medium telephoto.
Excellent clarity at all focal lengths. Includes 2 aspheric
lens elements to minimize spherical aberrations, coma
aberrations, and lens flare. Also includes a circular
aperture for natural off-subject defocusing. During AF
operation, the manual focus ring does not rotate, which
enhances the operability of the lens.
10
SAL7300 (7-300mm F.-.6)
SAL75300
75-300mm F4.5-5.6
• Lens groups/elements: 10/13
• Minimum focus: 9" (1. m)
• Filter diameter:  mm
• Size: (diameter x length): 2-13/16
x -13/16" (71 x 122 mm)
• Weight: 1 lb 0.2 oz (60 g)
Compact and lightweight zoom lens that ranges between
medium telephoto to telephoto focal lengths. Ideal for
portraits and for filling the frame with a subject that's
situated at a distance. Provides the dual advantages of
high optical performance and compact size because
of an optical system based on the double telephoto
zoom lenses. Also features a circular aperture for beautiful
defocusing, and a minimum focusing distance of 1. m.
Fixed Focal Length Lenses
SAL16F28
16mm F2.8 Fisheye
• Lens groups/elements: 8/11
(including 1 filter)
• Minimum focus: 7-7/8" (0.2 m)
• Filters:  types (built-in)
• Size: (diameter x length): 2-1/16
x 2-/8" (7 x 66. mm)
• Weight: 1.1 oz (00 g)
Allows you to capture dynamic images with all the
distinctive traits of a fisheye lens: curvilinear distortion,
exaggerated perspective, and an extremely deep depth
of field. The diagonal angle of view is 180° in 3 mm format
(110° in APS-C format). Clear images can be obtained
from 20 cm to infinity, even with the aperture wide open.
The lens includes  internal filters to select from.
• Filters: normal; O6 monochrome contrast filter; B12 red reduction
filter; A12 blue reduction filter.
Icons:
Circular aperture Internal focusing Focus Hold Button Focus Range limiter
• For details, please refer to the
SAL16F28 (16mm F2.8 Fisheye)
SAL20F28
20mm F2.8
• Lens groups/elements: 9/10
• Minimum focus: 9-7/8" (0.2 m)
• Filter diameter: 72 mm
• Size: (diameter x length): 3-1/16
x 2-1/8" (78 x 3. mm)
• Weight: 10.1 oz (28 g)
A wide-angle lens that demonstrates an extremely
high degree of distortion compensation, which allows
you to capture high-quality images with exaggerated
perspective and very deep depth of field. Images are
crisp from corner to corner as a result of lens coatings
and the reduction of internal light reflection. Various
aberrations are compensated for at focusing distances
from 2 cm to infinity. The rear focusing mechanism
enables quick focusing.
ADI flash metering SSM (Super sonic wave motor)
11
Lens Technology section on p.26–28.