Product Description
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Sony Camera Lenses SAL70200G2
From the Manufacturer
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70-200mm F2.8 G SSM II Telephoto Zoom Lens
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Zoom from 70mm medium telephoto to 200mm telephoto with a
constant F2.8 maximum aperture. Original Sony Nano AR Coating
technology suppresses internal reflections, minimizing flare and
ghosting for outstanding clarity from highlights to well-defined
blacks. Four ED glass elements contribute to prime-lens class
sharpness throughout the zoom range, but this lens can also
produce gorgeous background bokeh when needed.
Technology
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Circular Aperture
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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
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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
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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.
Focus hold button
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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
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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.
Distance encoder
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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.
Additional Features
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Internal focusing
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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.
SSM (Super Sonic wave Motor)
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SSM is a piezoelectric motor that contributes to smooth and
silent AF operation. The motor produces high torque at slow
rotation, and provides immediate start and stop responses. It is
also extremely quiet, which helps keep autofocusing silent.
Lenses that feature SSM also include a position-sensitive
detector to directly detect the a of lens rotation, a factor
that improves AF precision overall.
2013 Sony Electronics, Inc.
All rights reserved. Sony, the Sony logo, Alpha, “α” and Super
Steady are trademarks of Sony. All other trademarks are
trademarks of their respective owners.
- Brand: Sony.
- Model: SAL70200G2.
- Sony Model: SAL70200G2.