- Item Package Dimension: 7.24L x 4.803W x 4.56H inches.
- Item Package Weight - 1.807 Pounds.
- Item Package Quantity - 1.
- Product Type - CAMERA LENSES.
Product Description
-------------------
The extremely wide 27mm to 300mm equivalent range (35mm full
frame format) of this versatile E- zoom lens covers just
about any shooting situation, and a newly developed internal
drive motor offers smooth, quiet autofocus and aperture operation
that are a distinct advantage when shooting movies. The internal
Optical Steady (OSS) image stabilization system with Active
Mode offers effective stabilization even at the wide end of the
zoom range when shooting movies. When changing your aperture to
defocus the background, the light sources appear blurred. This
‘bokeh’ effect of the blurred background can be enhanced with
circular aperture blades used in this lens. Conventional aperture
blades have flat sides creating unappealing polygonal shaped
defocussed points of light. α lenses overcome this problem
through a unique design that keeps the aperture almost perfectly
circular from its wide-open setting to when it is closed by 2
stops. Smoother, more natural defocusing can be obtained as a
result. As focal lengths get longer, lenses built with
conventional optical glass have difficulties with chromatic
aberration, and as a result images suffer from lower contrast,
lower color quality, and lower resolution. ED glass dramatically
reduces chromatic aberration at telephoto ranges, and provides
superior contrast across the entire image, even at large aperture
settings. Super ED glass provides enhanced compensation for
chromatic aberration. Aspherical lens design dramatically reduces
spherical aberration while also reducing lens size and weight.
Spherical aberration is a slight misalignment of the light rays
projected on the image plane. This is caused by differences in
refraction at different points on conventional spherical lenses
which degrade image quality in large-aperture lenses. Specially
shaped “aspherical” elements near the diaphragm restore alignment
of light rays at the image plane, maintaining high sharpness and
contrast even at maximum aperture and can also be used at other
points in the optical path to reduce distortion. Well-designed
aspherical elements can reduce the total number of elements
required in the lens, thus reducing overall size and weight.
Advanced Aspherical (AA) elements are an evolved variant,
featuring an extremely high thickness ratio between the center
and periphery. AA elements are exceedingly difficult to produce,
relying on the most advanced molding technology to consistently
and precisely achieve the required shape and surface accuracy,
resulting in significantly improved image accuracy and quality.
The distance encoder plays an integral part in ADI flash
metering, which delivers high precision flash metering that is
unaffected by the reflectance of subjects or backgrounds. The
distance encoder is a lens component that directly detects the
position of the focusing mechanism, and sends a signal to the CPU
in order to measure distance to the subject. During flash
photography, this data is very useful in calculating how much
flash output is appropriate to the scene. Gyro sensors built into
the lens detect even the slightest movement, and the
stabilization lens is precisely shifted to counteract any image
blur that might occur. The use of precision, quiet linear motors
and technology inherited from high-end Sony professional
camcorders results in exceptionally quiet, effective image
stabilization that contributes to high-quality movies as well as
stills. Only the middle groups of the optical system move to
achieve focus, so the overall length of the lens does not change.
Other important benefits include fast autofocusing and a short
minimum focusing distance. Also, the filter thread at the front
of the lens does not rotate, which is convenient if you’re using
a polarizing filter. Moving around while shooting movies means
more camera shake that can cause blur. Although conventional
image stabilization systems were not effective at compensating
for this type of movement, “Active Mode” employs a wider range of
motion for the compensation lens, achieving improved
stabilization over a greater range of camera movement.
Stabilization at the wide end of the zoom range is significantly
improved, facilitating handheld movie shooting with minimum image
blur. 2010 Sony Electronics All rights reserved. Reproduction in
whole or in part without written permission is prohibited. Sony
is not responsible for typographic and photographic errors.
Features and specifications are subject to change without notice.
Sony, BIONZ, BRAVIA, BRAVIA Sync, Cyber-, Exmor, InfoLITHIUM,
Memory Stick PRO Duo, Memory Stick Duo, the Memory Stick logo,
Optical Steady, Remote Commander, Smile Shutter, Stamina,
Steady, Theatre Sync, TruBlack, and Xtra Fine LCD are
trademarks of Sony. Microsoft, Windows, and Windows Vista are
trademarks of Microsoft Corporation. Mac OS and iMovie are
trademarks of Apple Computers, HDMI is a trademark of HDMI
Licensing . All other trademarks are trademarks of their
respective owners.
From the Manufacturer
---------------------
E 18-200mm F3.5-6.3 OSS Zoom Lens
---------------------------------
The extremely wide 27mm to 300mm equivalent range (35mm full
frame format) of this versatile E- zoom lens covers just
about any shooting situation, and a newly developed internal
drive motor offers smooth, quiet autofocus and aperture operation
that are a distinct advantage when shooting movies. The internal
Optical Steady (OSS) image stabilization system with Active
Mode offers effective stabilization even at the wide end of the
zoom range when shooting movies.
Technology
----------
Circular Aperture
-----------------
When changing your aperture to defocus the background, the light
sources appear blurred. This ‘bokeh’ effect of the blurred
background can be enhanced with circular aperture blades used in
this lens. Conventional aperture blades have flat sides creating
unappealing polygonal shaped defocussed points of light. α lenses
overcome this problem through a unique design that keeps the
aperture almost perfectly circular from its wide-open setting to
when it is closed by 2 stops. Smoother, more natural defocusing
can be obtained as a result.
ED (Extra-low Dispersion) glass
-------------------------------
As focal lengths get longer, lenses built with conventional
optical glass have difficulties with chromatic aberration, and as
a result images suffer from lower contrast, lower color quality,
and lower resolution. ED glass dramatically reduces chromatic
aberration at telephoto ranges, and provides superior contrast
across the entire image, even at large aperture settings. Super
ED glass provides enhanced compensation for chromatic aberration.
Aspherical lens elements
------------------------
Aspherical lens design dramatically reduces spherical aberration
while also reducing lens size and weight. Spherical aberration is
a slight misalignment of the light rays projected on the image
plane. This is caused by differences in refraction at different
points on conventional spherical lenses which degrade image
quality in large-aperture lenses. Specially shaped “aspherical”
elements near the diaphragm restore alignment of light rays at
the image plane, maintaining high sharpness and contrast even at
maximum aperture and can also be used at other points in the
optical path to reduce distortion. Well-designed aspherical
elements can reduce the total number of elements required in the
lens, thus reducing overall size and weight. Advanced Aspherical
(AA) elements are an evolved variant, featuring an extremely high
thickness ratio between the center and periphery. AA elements are
exceedingly difficult to produce, relying on the most advanced
molding technology to consistently and precisely achieve the
required shape and surface accuracy, resulting in significantly
improved image accuracy and quality.
Distance encoder
----------------
The distance encoder plays an integral part in ADI flash
metering, which delivers high precision flash metering that is
unaffected by the reflectance of subjects or backgrounds. The
distance encoder is a lens component that directly detects the
position of the focusing mechanism, and sends a signal to the CPU
in order to measure distance to the subject. During flash
photography, this data is very useful in calculating how much
flash output is appropriate to the scene.
Lens-based optical image stabilization
--------------------------------------
Gyro sensors built into the lens detect even the slightest
movement, and the stabilization lens is precisely shifted to
counteract any image blur that might occur. The use of precision,
quiet linear motors and technology inherited from high-end Sony
professional camcorders results in exceptionally quiet, effective
image stabilization that contributes to high-quality movies as
well as stills.
Additional Features
-------------------
Internal focusing
-----------------
Only the middle groups of the optical system move to achieve
focus, so the overall length of the lens does not change. Other
important benefits include fast autofocusing and a short minimum
focusing distance. Also, the filter thread at the front of the
lens does not rotate, which is convenient if you’re using a
polarizing filter.
Optical image stabilization with Active Mode
--------------------------------------------
Moving around while shooting movies means more camera shake that
can cause blur. Although conventional image stabilization systems
were not effective at compensating for this type of movement,
“Active Mode” employs a wider range of motion for the
compensation lens, achieving improved stabilization over a
greater range of camera movement. Stabilization at the wide end
of the zoom range is significantly improved, facilitating
handheld movie shooting with minimum image blur.
2010 Sony Electronics Inc. All rights reserved. Reproduction in
whole or in part without written permission is prohibited. Sony
is not responsible for typographic and photographic errors.
Features and specifications are subject to change without notice.
Sony, BIONZ, BRAVIA, BRAVIA Sync, Cyber-, Exmor, InfoLITHIUM,
Memory Stick PRO Duo, Memory Stick Duo, the Memory Stick logo,
Optical Steady, Remote Commander, Smile Shutter, Stamina,
Steady, Theatre Sync, TruBlack, and Xtra Fine LCD are
trademarks of Sony. Microsoft, Windows, and Windows Vista are
trademarks of Microsoft Corporation. Mac OS and iMovie are
trademarks of Apple Computers, Inc. HDMI is a trademark of HDMI
Licensing LLC. All other trademarks are trademarks of their
respective owners.