- Brand is Sony.
- Minimum focus distance:1–1.5 m (AF)/1–1.35 m (MF) (3.28–4.93 ft [AF]/3.28–4.43 ft [MF]), Maximum Magnification ratio : 0.13x, Focal-Length : 70–200 mm.
- Interchangeable Lens.
- SEL70200G.
Product Description
-------------------
Sony SEL70200G 70-200mm Interchangeable Lens for Sony Alpha
Cameras. Angle of View 34°-12° 30' The small size, versatile 35mm
focal length, and outstanding overall performance of this Carl
Zeiss Sonnar T* lens make it an ideal match for compact 35mm full
frame format E- bodies. Although the optical design is
state-of-the-art, this superb wide angle lens remains true to the
original Sonnar concept with a bright F2.8 maximum aperture
(“Sonne” means “sun” in German). Three double-sided aspherical
elements minimize aberration so that stunning contrast and
resolution are maintained right out to the image edges at all
apertures. The renowned T* lens coating contributes to natural
color reproduction as well. 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. Effectively suppress reflections that can cause flare and
ghosting with Sony’s original Nano AR Coating technology. This
precisely defined regular nano-structure allows accurate light
transmission, contributing to high-quality images, even more so
than lenses with coatings that use an irregular nano-structure.
The reflection suppression characteristic of the Nano AR Coating
is superior to conventional anti-reflective coatings, providing a
notable improvement in clarity, contrast, and overall image
quality. 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.
Once you’ve adjusted focus to where you want it, pressing this
button on the lens barrel will keep the lens locked to that
focusing distance. The preview function can also be assigned to
this button through the camera’s custom settings. This function
allows you to set a limit on the focusing range which can save
you time during AF operation as the lens will not ‘hunt’ through
the entire focusing range. In macro lenses, this limit can be on
either the near or far range (as pictured). In the SAL70200G, the
limit is set on far ranges only. In the SAL300F28G, focusing can
be limited either to a far range or to a range that you specify
yourself. 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. Aluminum alloy is used in the construction
of the G Lenses and other high-end lenses to ensure high optical
performance. This material is lightweight, durable, and highly
resistant to the effects of temperature change. 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. The dust and moisture resistance design makes this lens
appropriate for heavy-duty outdoor use, especially when combined
with a camera that employs weather resistant measures. 2014 Sony
Electronics All rights reserved. Reproduction in whole or in part
without written permission is prohibited. Sony is not responsible
for typographical and photographic errors. Features and
specifications are subject to change without notice. All rights
reserved. Sony, the Sony logo, (alpha) log, G logo and Steady
are trademarks of Sony. All other trademarks are trademarks of
their respective owners. Sony and the Sony make.believe logo are
trademarks of Sony. Carl ZEISS and ZEISS is a trademark of Carl
Zeiss and Sony Corporation. All other trademarks are trademarks
of their respective owners.
From the Manufacturer
---------------------
FE 70-200mm F4 G OSS Full-frame E- Zoom Lens
-------------------------------------------------
The small size, versatile 35mm focal length, and outstanding
overall performance of this Carl Zeiss Sonnar T* lens make it an
ideal match for compact 35mm full frame format E- bodies.
Although the optical design is state-of-the-art, this superb wide
angle lens remains true to the original Sonnar concept with a
bright F2.8 maximum aperture (“Sonne” means “sun” in German).
Three double-sided aspherical elements minimize aberration so
that stunning contrast and resolution are maintained right out to
the image edges at all apertures. The renowned T* lens coating
contributes to natural color reproduction as well.
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.
Nano AR Coating
---------------
Effectively suppress reflections that can cause flare and
ghosting with Sony’s original Nano AR Coating technology. This
precisely defined regular nano-structure allows accurate light
transmission, contributing to high-quality images, even more so
than lenses with coatings that use an irregular nano-structure.
The reflection suppression characteristic of the Nano AR Coating
is superior to conventional anti-reflective coatings, providing a
notable improvement in clarity, contrast, and overall image
quality.
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.
Focus hold button
-----------------
Once you’ve adjusted focus to where you want it, pressing this
button on the lens barrel will keep the lens locked to that
focusing distance. The preview function can also be assigned to
this button through the camera’s custom settings.
Focus range limiter
-------------------
This function allows you to set a limit on the focusing range
which can save you time during AF operation as the lens will not
‘hunt’ through the entire focusing range. In macro lenses, this
limit can be on either the near or far range (as pictured). In
the SAL70200G, the limit is set on far ranges only. In the
SAL300F28G, focusing can be limited either to a far range or to a
range that you specify yourself.
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.
Aluminum alloy lens barrel
--------------------------
Aluminum alloy is used in the construction of the G Lenses and
other high-end lenses to ensure high optical performance. This
material is lightweight, durable, and highly resistant to the
effects of temperature change.
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.
Dust and Moisture Resistant
---------------------------
The dust and moisture resistance design makes this lens
appropriate for heavy-duty outdoor use, especially when combined
with a camera that employs weather resistant measures.
2014 Sony Electronics Inc. All rights reserved. Reproduction in
whole or in part without written permission is prohibited. Sony
is not responsible for typographical and photographic errors.
Features and specifications are subject to change without notice.
All rights reserved. Sony, the Sony logo, (alpha) log, G logo and
Steady are trademarks of Sony. All other trademarks are
trademarks of their respective owners.
Sony and the Sony make.believe logo are trademarks of Sony. Carl
ZEISS and ZEISS is a trademark of Carl Zeiss and Sony
Corporation. All other trademarks are trademarks of their
respective owners.