Sony a Lenses - Manual (Page 12)

Mid-range zoom
DT 18–55mm F3.5–5.6 SAM SAL1855
If you’re the kind of photo enthusiast who likes to carry a camera at all times,
whether actively shooting or not, you probably want one small, lightweight
lens that won’t be a burden while walking around but will deliver top quality
and versatility when a photographic opportunity arises. The SAL1855 is the
smallest and lightest zoom in this series, weighing in at only 210 grams while
offering an 18–55mm focal length range that will cover most day-to-day
subjects. It also features a minimum focusing distance of just 25 centimeters
that, combined with 0.34x maximum magnification, will let you get close
and explore details. If you want to be prepared for a wider range of subjects
the SAL1855 is the perfect companion for the SAL55200-2, the pair providing
excellent optical performance from 18mm to 200mm.
• Weight (approx): 210 g
• Dimensions (Dia. x L): 69.5 x 69 mm
• Max. magnification ratio: 0.34x
One ED glass element and two aspherical elements for superior
image quality
0.25m min. focus plus 0.34x max. magnification for close-ups
Responsive internal SAM (Smooth Autofocus Motor) autofocus drive
Circular aperture for attractive defocusing
35mm equivalent focal length: 27–82.5mm
Aspherical lens ED glass
A mode, 1/80 sec., F5.6, ISO 100, Daylight white balance; Photo: Norifumi Inagaki
Spatial frequency
10 line pairs/mm
30 line pairs/mm
R: Radial values T: Tangential values
Max. aperture
R R T T
F8 aperture
100
80
60
40
20
0 3 6 9 12
Contrast
(%)
Distance from optical center
of lens (mm)
At 18 mm
100
80
60
40
20
0 3 6 9 12
Contrast
(%)
Distance from optical center
of lens (mm)
At 55 mm
22 23
Mid-range telephoto zoom
DT 18–135mm F3.5–5.6 SAM SAL18135
Developed to provide the most ideal focal range for normal use—
covering frequently-used focal lengths between 18mm and 135mm—
the Sony SAL18135 mid-range zoom lens enables rich expression for a
wide range of shots. Direct Manual Focus (DMF) allows you to switch
between AF and MF without removing your eyes from the viewfinder
to seize fleeting photo ops with ease. Plus, enjoy smooth and quiet AF
thanks to the Smooth Autofocus Motor (SAM), which also improves AF
response when shooting moving subjects. And with a single ED glass
lens element as well as a pair of Aspherical lens elements, the SAL18135
delivers images with low levels of color aberration for excellent image
quality in any setting.
• Weight (approx): 398 g
• Dimensions (Dia. x L): 76 x 86 mm
• Max. magnification ratio: 0.25x
DT 18-200mm f/3.5-5.6 mid-range zoom lens
DT lens design for optimum DSLR performance
Silent, high-speed AF drive via SAM
Excellent wide-angle to long telephoto shots
Aspherical lens ED glass
M Mode, 1/800 sec., f8.0, ISO 200
100
80
60
40
20
0 3 6 9 12
Contrast
(%)
100
80
60
40
20
0 3 6 9 12
Contrast
(%)
Distance from optical center
of lens (mm) Distance from optical center
of lens (mm)
Spatial frequency
10 line pairs/mm
30 line pairs/mm
R: Radial values T: Tangential values
Max. aperture
R R T T
F8 aperture
At 18 mm At 135 mm