Sony a Lenses - Manual (Page 13)

High magnification zoom
DT 18–200mm F3.5–6.3 SAL18200
It will take you from a wide scene-spanning 18mm to far-reaching
200mm telephoto that will let you zoom in on distant subjects, yet the
SAL18200 weighs only 405 grams and is no larger than many zooms
of more limited range. For these reasons it is an excellent choice for
photographers who want to cover as many situations as possible
without having to change lenses. In addition to being an outstanding
one-lens solution, it features a refined optical design that ensures
excellent sharpness and contrast throughout the image at all focal
lengths, so you can shoot with confidence in any situation that arises.
• Weight (approx): 405 g
• Dimensions (Dia. x L): 73 x 85.5 mm
• Max. magnification ratio: 0.27x
Two ED glass elements and three aspherical elements for superior image quality
Broad zoom range in a compact, lightweight lens
Circular aperture for attractive defocusing
Internal focusing for fast autofocus and short min. focus distance
35mm equivalent focal length: 27–300mm
Aspherical lens ED glass
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 200 mm
High magnification zoom
DT 18–250mm F3.5–6.3 SAL18250
Although similar to the SAL18200 in zoom range and performance, the
SAL18250 offers a bit more “reach” at the long end that can make a
significant difference if you’re shooting sports or wildlife, for example.
The tradeoff is a small increase in weight and size, but if you need the
extra range the difference is worth it. You get the same outstanding
clarity and contrast from the wide 18mm end to full 250mm telephoto,
making this lens one of the most useful and versatile for APS-C format
cameras and an extremely wide spectrum of subjects.
• Weight (approx): 440 g
• Dimensions (Dia. x L): 75 x 86 mm
• Max. magnification ratio: 0.29x
Two ED glass elements and two aspherical elements for superior image quality
Extra-broad zoom range in a compact, lightweight lens
Circular aperture for attractive defocusing
Internal focusing for fast autofocus and short min. focus distance
35mm equivalent focal length: 27–375mm
Aspherical lens ED glass
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 250 mm
S mode, 1/250 sec., F6.3, +1.0 EV, ISO 3200, Auto white balance; Photo: Shinya Morimoto P mode, 1/125 sec., F5.6, +0.3 EV, ISO 100, Auto white balance, Portrait Creative Style; Photo: Norifumi Inagaki
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