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APS-C
35mm
DT 50mm F1.8 SAM
1
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2
1 2 3
4 5
6
(
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1
(1) (2) 2
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AF( )
AF/MF AF/MF
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MF( )
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MF MF
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MF
English
You will find information on using lens in this manual. Precautions
common to lenses, such as notes on use will be found in “Precautions
before using” on a separate sheet. Be sure to read both documents before
using the lens.
This manual is for use with several different lenses.
This lens is designed for Sony
α mount cameras (models equipped with APS-
C sized image sensor). You cannot use on 35mm-format cameras.
The DT 50mm F1.8 SAM is used for illustrations in this book, unless otherwise
mentioned.
Notes on use
When you carry the camera with the lens attached, make sure to hold both the
camera and the lens steadily.
Do not hold by any part of the lens that protrudes when focusing.
Precautions for flash use
When using a built-in camera flash, make sure to shoot from at least 1m (3.3
feet) away from your subject. With certain of lens/flash combinations, the lens
may partially block the light of the flash, resulting in a shadow at the bottom of
the picture.
When using the Ring Light* or Macro Twin Flash Kit*, use the Macro Light
Adaptor*.
* Ring Light, Macro Twin Flash Kit and Macro Light Adaptor are sold
separately.
Vignetting
When you use lens, the corners of the screen become darker than the center. To
reduce this phenomena (called vignetting), close the aperture by 1 to 2 stops.
Names of parts
1…Focusing ring 2…Distance scale 3…Distance index 4…Lens contacts
5…Focusing mode switch 6…Mounting index
Attaching/detaching the lens
To attach the lens (See illustration
–
.)
1 Remove the rear and front lens caps and the camera body
cap.
You can attach/detach the front lens cap in two ways, (1) and (2).
2 Align the orange index on the lens barrel with the orange
index on the camera (mounting index), then insert the lens
into the camera mount and rotate it clockwise until it locks.
Do not press the lens release button on the camera when mounting the lens.
Do not mount the lens at an angle.
To remove the lens (See illustration
–
.)
While pressing and holding the lens release button on the camera,
rotate the lens counterclockwise until it stops, then detach the lens.
4-157-876-01(1)
©2009 Sony Corporation
Printed in Japan
SAL50F18/SAL30M28
/
Lens for Digital Single Lens Reflex Camera/
Objectif pour appareil photo numérique
reflex à objectifs interchangeables/
DT 50mm F1.8 SAM
/
Operating Instructions/Mode d'emploi/Manual de
instrucciones/
DT 50mm F1.8 SAM
Specifications
35mm
*
1
(mm)
*
1
*
2
(m)
( ) (mm) ( mm)
( g)
Name
(Model name)
Equivalent 35mm-
format focal
length*
1
(mm)
Lens groups-
elements
Angle of
view*
1
Minimum
focus*
2
(m (feet))
Maximum
magnification
(X)
Minimum
f-stop
Filter diameter
(mm)
Dimensions
(maximum diameter
× height)
(approx., mm (in.))
Mass
(approx., g
(oz.))
DT 50mm
F1.8 SAM
(SAL50F18)
75 5-6 32°
0.34
(1.12)
0.2 f/22 49
70×45
(2 7/8 × 1 13/16)
170
(6)
DT 30mm
F2.8 Macro
SAM
(SAL30M28)
45 5-6 50°
0.129
(0.42)
1 f/22 49
70×45
(2 7/8 × 1 13/16)
150
(5 1/4)
*
1
35mm APS-C
*
2
ADI ADI
DT 50mm F1.8 SAM/DT 30mm F2.8 Macro SAM (1) (1) 1
*
1
The values for equivalent 35mm-format focal length and angle of view are based on Digital Single Lens Reflex Cameras equipped with an APS-C sized image sensor.
*
2
Minimum focus is the shortest distance from the image sensor to the subject.
This lens is equipped with a distance encoder. The distance encoder allows more accurate measurement (ADI) by using a flash for ADI.
Depending on the lens mechanism, the focal length may change with any change of the shooting distance. The focal length assumes the lens is focused at infinity.
Included items
DT 50mm F1.8 SAM/DT 30mm F2.8 Macro SAM: Lens (1), Front lens cap (1), Rear lens cap (1), Set of printed documentation
Design and specifications are subject to change without notice.
is a trademark of Sony Corporation.
–1
(1) (2)
–2
DT 30mm F2.8 Macro SAM
Focusing
When using auto focus, the camera adjusts the focus automatically.
While the camera is focusing automatically, do not touch the rotating focusing
ring.
The camera’s direct manual focus function cannot be used with this lens. (Some
cameras do not have the direct manual focus function. If your camera has this
function, this restriction is explained in the section on focusing, in your camera’s
instruction manual).
You cannot switch between AF/MF mode with the AF/MF button on the camera
(Depending on the camera, the AF/MF button may not exist. If your camera
has this function, this restriction is explained in the section on focusing, in your
camera’s instruction manual).
In MF (Manual Focus) mode, rotate the focusing ring while looking through
the viewfinder to focus. (See illustration .)
The focus signal in the viewfinder indicates the current degree of focusing.
To switch AF (Auto Focus)/MF (Manual Focus) mode
You can switch between AF (automatic focus) and MF (manual focus) with
the focusing mode switch on the lens. Make sure to set the focusing mode
switch (lever) on the camera to AF.
Make sure to set the focusing mode switch to MF for manual focus. Do not
rotate the focusing ring without setting to MF. Rotating the focusing ring
forcibly without switching to MF may damage the focusing ring.
To shoot a subject at infinite distance in MF mode
The infinity position provides for some adjustment to compensate for focus
shift caused by change in temperature. To shoot a subject at infinite distance
in MF mode, use the viewfinder and set focus.