Sony a Lenses - Manual (Page 16)

Fisheye
16mm F2.8 Fisheye SAL16F28
Once a scientific tool but now a favorite of creative photographers,
fisheye lenses forgo the restraints of rectilinear perspective—the
complex “correction” that is required to keep straight lines looking
straight—to deliver expansive images that cover an extremely wide
angle of view with curvilinear perspective. The SAL16F28 provides
an extremely wide 180° angle of view on 35mm full-frame format
cameras (110° on APS-C format cameras). In addition to eye-catching
interpretations of reality, it offers extended depth of field so that you
can capture huge vistas in which everything from 20 centimeters to
infinity is sharp, even at maximum aperture. Since the bulging front
element and wide angle of view prevent the use of external screw-in
filters, four selectable internal filter settings are provided: normal, O56
monochrome, B12 red reduction and A12 blue reduction.
• Weight (approx): 400 g
• Dimensions (Dia. x L): 75 x 66.5 mm
• Max. magnification ratio: 0.15x
180° angle of view on full-frame cameras
Curvilinear perspective for unique, expansive images
Crisp image quality throughout the focus range
Four selectable internal filter settings
100
80
60
40
20
0 3 6 9 12 20
Distance from optical center of lens (mm)
Contrast
(%)
Spatial frequency
10 line pairs/mm
30 line pairs/mm
R: Radial values T: Tangential values
Max. aperture
R R T T
F8 aperture
Ultra wide angle
20mm F2.8 SAL20F28
This rigorously corrected lens gives you a wide angle of view for images
that benefit from dramatic perspective with minimum distortion. It’s an ideal
choice for covering spread-out scenes that you can’t get far enough way
from to cover with a “normal” lens. But there’s more: since it has extended
depth of field that can keep everything from 25 centimeters to infinity in crisp
focus, you can create exaggerated perspective by including very close and
very distant objects in the frame. Close objects will loom large, while distant
objects appear to recede markedly into the distance. Meticulous attention
has been paid to minimizing flare and internal reflections in this advanced
design, with the result that excellent sharpness and contrast are maintained
through the image.
• Weight (approx): 285 g
• Dimensions (Dia. x L): 78 x 53.5 mm
• Max. magnification ratio: 0.13x
Wide 94° angle of view on full-frame cameras
Precisely corrected for natural perspective
Aberration effectively suppressed throughout the focus range
Rear-focusing mechanism for fast autofocus response
Circular aperture for attractive defocusing
100
80
60
40
20
0 3 6 9 12 20
Distance from optical center of lens (mm)
Contrast
(%)
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 16 mm At 20 mm
A mode, 1/200 sec., F7.1, -0.3 EV, ISO 200, Auto white balance; Photo: Yuji Nukui M mode, 1/125 sec., F11, ISO 200, Landscape Creative Style; Photo: Yuji Nukui
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