Sony 135mm f2.8 STF Manual

Sony Linse 135mm f2.8 STF

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Side 1/2

(1) (2)

1···Focusing ring 2···Distance scale 3···Stepless

aperture range 4···Lens contacts 5···Mounting index

6···A position 7···Aperture ring 8···Distance index

9···Depth-of-ﬁeld scale

1 2

79 8

This lens is a manual focus lens with a highly developed defocusing

design. A special apodization element gives defocused areas a smooth and

attractive appearance. This lens is equipped with the aperture ring that

enables a stepless aperture setting between F No.2.8-5.7 (T No.4.5-6.7 ), and *

makes the most of the defocusing effect in the foreground and background

areas. Enjoy this unique image-expression, which cannot be duplicated on

traditional lenses.

* T No. (T-Numbers) : the T No. is a practical value that indicates how much

light is in the lens, allowing for the lens’s transmission rate. Although this

lens’s wide-open aperture is f/2.8, the special apodization system provides the

light amount of T/4.5, which is the same as that of f/4.5 on a normal lens. The

aperture value on the lens, the value indicated on a camera, and the value used

when determining the exposure are all indicated by T No. Use the T No. as a

normal aperture value.

This lens is designed for Sony cameras.

WARNING

To reduce ﬁre or shock hazard, do not expose the unit to rain or moisture.

Do not directly look at the sun through this lens.

Doing so might harm your eyes or cause loss of eyesight.

Keep the lens out of reach of small children.

There is danger of accident or injury.

Disposal of Old Electrical & Electronic Equipment

(Applicable in the European Union and other

European countries with separate collection

systems)

This symbol on the product or on its packaging indicates that

this product shall not be treated as household waste. Instead it

shall be handed over to the applicable collection point for the

recycling of electrical and electronic equipment. By ensuring this product is

disposed of correctly, you will help prevent potential negative consequences

for the environment and human health, which could otherwise be caused

by inappropriate waste handling of this product. The recycling of materials

will help to conserve natural resources. For more detailed information

about recycling of this product, please contact your local Civic Ofﬁce, your

household waste disposal service or the shop where you purchased the

product.

For the customers in the U.S.A.

THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES.

OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS:

(1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE,

AND (2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE

RECEIVED, INCLUDING INTERFERENCE THAT MAY CAUSE

UNDESIRED OPERATION.

CAUTION

You are cautioned that any changes or modiﬁcations not expressly approved

in this manual could void your authority to operate this equipment.

NOTE:

This equipment has been tested and found to comply with the limits for a

Class B digital device, pursuant to Part 15 of the FCC Rules. These limits

are designed to provide reasonable protection against harmful interference

in a residential installation. This equipment generates, uses, and can radiate

radio frequency energy and, if not installed and used in accordance with the

instructions, may cause harmful interference to radio communications.

However, there is no guarantee that interference will not occur in a particular

installation. If this equipment does cause harmful interference to radio or

television reception, which can be determined by turning the equipment off

and on, the user is encouraged to try to correct the interference by one or

more of the following measures:

– Reorient or relocate the receiving antenna.

– Increase the separation between the equipment and receiver.

– Connect the equipment into an outlet on a circuit different from that to which the

receiver is connected.

– Consult the dealer or an experienced radio/TV technician for help.

For the customers in Canada

This Class B digital apparatus complies with Canadian ICES-003.

Notes on use

• Do not leave the lens in direct sunlight. If sunlight is focused onto a nearby

object, it may cause a ﬁre. If circumstances necessitate leaving the lens in direct

sunlight, be sure to attach the lens cap.

• Be careful not to subject the lens to mechanical shock while attaching it.

• Always place the lens caps on the lens when storing.

• Do not keep the lens in a very humid place for a long period of time to prevent

mold.

• Do not hold the camera by the lens part extended for focusing, etc.

• Do not touch the lens contacts. If dirt, etc., gets on the lens contacts, it may

interfere or prevent the sending and receiving of signals between the lens and the

camera, resulting in operational malfunction.

 Names of parts

SAL135F28

Lens for Digital Single Lens

Reﬂex Camera

Operating Instructions

135mm F2.8 [T4.5] STF

2-685-150- (1)11

 Attaching/detaching the lens

To attach the lens

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). When you attach/detach the

lens cap with the lens hood attached, use method (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

While pressing and holding the lens release button on the camera, rotate the

lens counterclockwise until it stops, then detach the lens.

 Attaching the lens hood

It is recommended that you use a lens hood to reduce ﬂare and ensure maximum image

quality.

Align the lens hood with the tip of the lens and rotate it clockwise.

• When using a built-in camera ﬂash, make sure to remove the lens hood to avoid blockage of the

ﬂash light.

• When storing, turn over the lens hood and place it onto the lens backwards.

 Focusing

This lens is a manual-focus lens.

1 Select manual-focus mode on your camera.

• Refer to the camera manual for details.

• This lens can be used in manual-focus mode, even if your camera is set to autofocus mode.

Condensation

If your lens is brought directly from a cold place to a warm place,

condensation may appear on the lens. To avoid this, place the lens in a plastic

bag or something similar. When the air temperature inside the bag reaches

the surrounding temperature, take the lens out.

Cleaning the lens

• Do not touch the surface of the lens directly.

• If the lens gets dirty, brush off dust with a lens blower and wipe with a soft,

clean cloth (Cleaning Cloth KK-CA (optional) is recommended).

• Do not use any organic solvent, such as thinner or benzine, to clean the lens or

the camera cone.

2 Turn the focusing ring until the image appears sharp.

• The focus signal found in the viewﬁnder does not work.

Stepless aperture range

A position

Stepless aperture

Automatic aperture (functioning

when set to the A position)

0.25X 0.20X 0.15X 0.08X 0.029X

0.87 1.0 1.2 2.0 5.0

0+ 3

4+1

2+1

Exposure correction

Magniﬁcation ratios

Distance

Apodization element

Intensity decreases gradually

toward the perimeter

Gradually diffused without losing

shape

Intensity stays the same Line becomes thicker

Speciﬁcations

Name

(Model name)

Equivalent

35mm-format

focal length*1

(mm)

Lens

groups-

elements

Angle of

view 1*3

Angle of

view 2*3

Minimum

focus*4

(m (feet))

Maximum

magniﬁcation

(×)

Minimum

f-stop

Filter

diameter

(mm)

Dimensions

(maximum

diameter × height)

(mm (in.))

Mass

(g (oz.))

135mm

F2.8 [T4.5] STF

(SAL135F28)

202.5 6-8*218° 12° 0.87 (2.85) 0.25 f/31

(T/32) 72 Approx. 80×99

(3 1/8×3 7/8)

Approx. 730

(25 3/4)

The value for equivalent 35mm-format focal length is based on Digital Single Lens Reﬂex Cameras equipped with an APS-C sized image sensor.

Including apodization element (1-2)

The value of angle of view 1 is based on 35mm-format cameras, and that of angle of view 2 is based on Digital Single Lens Reﬂex Cameras equipped with an APS-C sized image sensor.

Minimum focus is the shortest distance from the image sensor to the subject.

Included items: Lens (1), Front lens cap (1), Rear lens cap (1), Lens hood (1), Exclusive case (1), Set of printed documentation

Designs and speciﬁcations are subject to change without notice.

is a trademark of Sony Corporation.

 Aperture

This lens has two aperture settings; A position and a stepless aperture control. Use

the aperture ring to switch between the two settings. T No. is used in both notation

and control on the camera and lens.

To use the stepless aperture setting

This setting allows stepless control of the aperture between T/4.5 - T/6.7. Turn the

aperture ring to set the desired aperture.

• This stepless range is recommended when a large aperture is desired.

• Set your camera to A mode or M mode when using this setting. (In P mode or scene-

selection setting, the settings will be the same as A mode. In S mode, the settings will

be the same as M mode.)

• A slight click can be felt at the T/4.5, T/5.6, and T/6.7 marks.

• The index marks between T/4.5 and T/5.6 represent 1/3 aperture values.

• Stop-down metering is used when the stepless aperture is selected.

• When shooting, the aperture values set by the aperture ring are used. Those values are

not accurately reﬂected in the values displayed or recorded by the camera.

To use the A position

This setting (A position) allows the lens to be used the same way as traditional manual-focus lenses. Set the aperture on

your camera.

• All exposure modes (P, A, S, M) can be used on the camera.

Aperture Information

This lens has two apertures; the stepless aperture, manually controlled with

the aperture ring, and the automatic aperture (A position), controlled by

the camera. In the stepless aperture setting, emphasis is put on the aperture

shape, which is rounder than the automatic aperture. For large aperture

settings, selecting the stepless aperture is recommended.

 Depth of ﬁeld (in meters)

When focus is set on a subject, anything at that same distance will appear sharp, and anything within a certain range

before and beyond the subject will also appear in focus; this is called depth of ﬁeld. Depth of ﬁeld depends on the

subject distance and aperture you choose.

T/4.5 T/5.6 T/6.7 T/8 T/11 T/16 T/22 T/32

∞∞

114.8

∞

97.8

∞

82.3

∞

69.2

∞

49.0

∞

34.7

∞

24.6

∞

17.4

10m 10.91

9.23

11.08

9.11

11.32

8.96

11.61

8.79

12.44

8.37

13.84

7.84

16.48

7.20

22.58

6.46

5m 5.21

4.81

5.24

4.78

5.29

4.74

5.35

4.69

5.51

4.58

5.76

4.42

6.15

4.22

6.80

3.97

3m 3.068

2.935

3.080

2.924

3.096

2.910

3.115

2.894

3.165

2.852

3.239

2.795

3.350

2.719

3.522

2.618

2m 2.027

1.974

2.032

1.969

2.038

1.963

2.046

1.956

2.065

1.939

2.094

1.915

2.135

1.882

2.198

1.837

1.5m 1.514

1.478

1.156

1.484

1.519

1.481

1.523

1.478

1.533

1.469

1.547

1.456

1.567

1.439

1.597

1.415

1.2m 1.028

1.192

1.209

1.191

1.211

1.189

1.213

1.187

1.219

1.182

1.226

1.175

1.238

1.165

1.254

1.151

1.0m 1.005

0.995

1.006

0.994

1.007

0.993

1.008

0.992

1.011

0.989

1.016

0.985

1.023

0.978

1.033

0.970

0.87m 0.873

0.867

0.874

0.866

0.874

0.866

0.875

0.865

0.877

0.863

0.881

0.860

0.885

0.856

0.891

0.850

The depth-of-ﬁeld scale and depth-of-ﬁeld table are for 35mm-format cameras. The depth of ﬁeld is shallower when you

use Digital Single Lens Reﬂex Cameras equipped with an APS-C sized image sensor.

 Exposure compensation

As the magniﬁcation increases, the amount of light reaching the image sensor decreases. This is automatically

compensated in all autoexposure modes, or in the manual exposure mode as long as the exposure is adjusted according

to the camera’s meter index. If your camera is set to the manual exposure mode and you are using a hand-held exposure

meter, or if your camera is set to the manual exposure mode and you are using the Manual Flash Control function

available on some external ﬂash units, adjust exposure accordingly.

(E.g., when adjusting by the aperture, +1 means opening the aperture 1 more stop.)

About Apodization

A special “apodization element” is situated near the aperture of the lens

optical system. This special optical element is a type of ND ﬁlter which

gradually becomes thicker (darker) towards the perimeter, thereby reducing

the amount of light that passes through around the outer perimeter. The

aperture of this lens is indicated and controlled by the T No., which

compensates for the reduction imposed by the special apodization element.

The T No. can be used as the F No. on a normal lens when the exposure is

determined.

Principle of defocusing effect improvement

Defocusing of a dot Defocusing of a line

This lens

Theoretical ideal

traditional lens

Defocused images appear as blurred clusters of dots. A lens with well compensated aberration reproduces the

image shape accurately, but cannot produce smooth blurs in a defocused area. There may be unpleasant blurs,

which for example, make one line appear to be doubled, depending on the way of compensation. This lens adopts a

special apodization element that provides a gradually diffused image toward the perimeter without losing the core

shape. In other words, it provides soft and natural defocusing without transforming the original shape unnaturally.

Produkt Specifikationer

Mærke:	Sony
Kategori:	Linse
Model:	135mm f2.8 STF

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