Sony a Lenses - Manual (Page 19)

Mid-range telephoto
85mm F2.8 SAM SAL85F28
Photographers often choose a large-aperture 85mm lens for portraits for
two compelling reasons. First, the 85mm focal length makes it easy to fill
the frame with the subject from a comfortable distance, without getting
so close that unflattering distortion occurs. And second, a large maximum
aperture works with the medium-long focal length to create beautifully
defocused backgrounds, so that the subject seems to “pop” out of the
image. The SAL85F28 is just such a lens. But it’s not just limited to portraits. It’s
a great choice for any situation where you want a bit more magnification
than a “standard” focal length provides. And the fact that it is light and
compact means that it’s easy to take along as a second lens.
• Weight (approx): 175 g
• Dimensions (Dia. x L): 70 x 50 mm
• Max. magnification ratio: 0.2x
Compact, lightweight and eminently portable
Excellent corner-to-corner sharpness
Large maximum aperture plus circular aperture design for smooth defocusing
Responsive internal SAM (Smooth Autofocus Motor) autofocus drive
Distance from optical center of lens (mm)
Contrast
(%)
100
80
60
40
20
0 4 8 12 16 20
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 85 mm
Telephoto
135mm F2.8 [T4.5] STF SAL135F28
This unique lens has been specifically designed to deliver smooth
transitions between crisp in-focus areas and creamily defocused
background and foreground areas. It uses special apodization* optics
to produce images that seem to have an extra dimension, with high
resolution at the plane of focus, gradually melting away to beautifully
diffused out of focus rendition. With some lenses highlights in defocused
areas can be distracting, but with this unique Smooth Trans Focus design
they retain their natural shape in a way that doesn’t detract from the
defocused background or foreground, and there’s no ugly double-line
defocusing. The SAL135F28 promises a one-of-a-kind photographic
experience. A manual aperture ring is provided for direct, hands-on
defocusing control.
• Weight (approx): 730 g
• Dimensions (Dia. x L): 80 x 99 mm
• Max. magnification ratio: 0.25x
* “Apodization” is the technical term for changing the shape of a mathematical
function; in this case the optical transmission characteristics of the lens.
• For details of STF technology. See pg.17.
Unique Smooth Trans Focus design featuring apodization optics
Sharp in-focus areas with extra-smooth background and
foreground defocusing
Smooth, natural highlight diffusion
Manual focus and manual aperture ring
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 135 mm
M mode, 1/640 sec., F2.8, -0.3EV, ISO 200, Manual white balance A mode, 1/400 sec., F4.5, ISO 200, 5300K color temperature; Photo: Chukyo Ozawa
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