Product Description
SEL100F28GM Sony Alpha Full-frame E-mount Smooth Trans Focus lens
A unique 100mm mid-telephoto lens featuring STF (Smooth Trans Focus)
technology that can elevate portraits and subjects that benefit from smooth
background bokeh to new artistic heights while boasting G Master resolution. It
also offers close-up capability with up to 0.25x magnification and fast, precise
and quiet autofocus. Optical SteadyShot image stabilization minimizes blur.
Unique Smooth Trans Focus G Master
G Master design combines extraordinary sharpness and smooth Bokeh in one
lens. STF (Smooth Trans Focus) realizes an ultimate collaboration of impressive
bokeh and high resolution that only Sony can offer. It is not easy to achieve
spatial frequency of 50 line pairs per millimeter at a lens' widest aperture and
produce smooth beautiful bokeh at the same time, but that is Sony's baseline for
G Master design. Unprecedented resolution and other demanding design parameters
yield outstanding reproduction of the most detailed subjects and scenes with
superior contrast throughout every frame. G Master resolution is simply the
highest in its class.
Apodization element eliminates distortion of defocused highlight s
A unique feature of the STF lens is the special optical apodization (APD)
element which produces exceptionally smooth background and foreground bokeh. The
APD element acts as a graduated neutral density filter, with light
transmissivity highest at the center and then gradually decreasing towards the
periphery to ensure extraordinarily smooth bokeh. The APD element ensures
equally smooth foreground and background defocus, without double-line effects.
Selectable Macro mode " two lenses in one.
Besides being a perfect portrait lens, the SEL100F28GM incorporates a
convenient ring-switch on the lens barrel to select from full range to a macro
range. With close-up focus capability up to 1.87ft. (0.57m) min. and 0.25x max.
magnification. Its like having two lenses in one.
Instant auto/manual focus selection
Instantly and quickly switch between auto and manual focus via an AM/MF
switch on the side of the lens. This makes operation faster and easier as you
let the camera and lens focus for you, or decide to take control and manually
focus on the precise point you chose.
11-blade circular aperture contributes to gorgeous bokeh
The 11-blade circular aperture maximizes the beauty of this large-aperture
prime-lens, contributing to impressive images in which the subject stands out
against a smoothly defocused foreground and background bokeh as well as
perfectly round points of defocused light. Conventional aperture blades have
flat sides creating unappealing, polygonal shaped defocused 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.
Aspherical lens dramatically reduces spherical 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.
Dust and moisture resistant for robust reliability
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.
Direct Drive SSM (DDSSM) for fast, quiet, precise focusing
The SEL100F28GM lens supports both contrast AF and focal-plane phase
detection AF, and has a high-precision Direct Drive Super Sonic Motor (DDSSM)
system that ensures exceptionally fast, quiet and accurate AF performance. The
focusing systems double linear motor takes on the vital role of providing
high-speed actuation for the AF contrast detection system when shooting video.
Significantly reduces blur
High-performance Optical SteadyShot image stabilization is built right into
the lens for sharp, blur-free images with a wide range of subjects. The
stabilization lens is driven by a linear motor for fast, precise stabilization.
Additionally, 5-axis image stabilization becomes available when used with α
series cameras that feature built-in image stabilization.
F2.8 max aperture maintains exposure and depth of field
F2.8 max aperture maintains exposure and depth of field. When changing your
aperture to defocus the background, the areas out of the focal plane appear
blurred. This bokeh effect of the blurred background is enhanced with circular
aperture blades used in this lens.
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