Thank you for purchasing the smc PENTAX-DA lens.

This smc PENTAX-DA lens features a “Quick-Shift Focus System” that lets you finely adjust the focus manually after the focus has been adjusted in addition to allowing you to enjoy taking pictures using autofocus or manual focus by mounting on the

PENTAX -series digital SLR camera. For further information on the use of this function, refer to p10.

This lens can be used only with PENTAX compatible with film SLR cameras.

-series SLR cameras. It is not

Please read this operating manual carefully before using the lens to ensure that it is used properly. In addition, also refer to your camera’s operating manual.

In this operating manual, “smc PENTAX-DA lens” is shortened to “DA lens.”

Illustrations shown herein may differ from the actual appearance.



Although we have carefully designed these lenses for safe operation, please pay special attention to items marked with the following symbols when using this product.



This symbol indicates precautions that if not followed, could result in serious injury to the user.

This symbol indicates precautions that if not followed, could result in minor or medium injury to the user or damage to the equipment.


Never look at the sun through the lens or camera. Serious damage to the retina or

total loss of eyesight may occur.


Do not leave the lens in direct sunlight without lens caps. Direct sunlight passing

through the lens will be intensified, and should it focus on flammable materials, fire may occur.



1. Storage and mildew prevention

• Take the lens out of the protective case or camera bag, and store it in a dry, well-ventilated place.

• Avoid storing the lens in a poorly ventilated location such as a closet, wardrobe, drawer, vehicle, or where insect repellent or medicine is kept.

• Avoid storing the lens in areas of high temperature and humidity, where there is a risk of mildew growth.

Store the lens with a desiccant in a dry cabinet, airtight container, or plastic bag. (Leaving a saturated desiccant in the storage container can cause damage to the lens. Be sure to read the instructions that come with the desiccant before use.)

2. The lens is not waterproof. When using the lens in a rain or mist, be careful not to allow it to get wet.

3. Never use any organic solvent such as thinner, alcohol, or benzine, etc. to remove dust on the lens.

4. The lens is a precise optical instrument. Be careful not to let it fall, or subject it to strong shocks or pressure. Use a cushion or similar pad to protect the lens from the vibrations of motorcycles or other vehicles, boats, etc.

5. Avoid subjecting the lens to rapid changes in temperature, otherwise condensation can occur on both the inside and the outside of the lens. Put the lens in a plastic bag or camera bag, and take it out after the lens has reached ambient temperature.

6. When the lens is not attached to the camera body, attach both the supplied lens cap and lens mount cap to protect it from dust.

7. Do not leave the camera with the lens cap off attached to a tripod or other rigid camera support. The inner parts of the camera can be damaged by direct sunlight.

8. Have the lens inspected by a dealer every one or two years to maintain its high performance.





° FOR SAFE USE OF YOUR LENS ···························································································· 1

° PRECAUTIONS AND LENS MAINTENANCE ········································································· 2

° smc PENTAX-DA LENS ·········································································································· 4

• About the DA Lens Mount ····································································································· 5

° MOUNTING AND REMOVING THE LENS ·············································································· 6

° LENS CAP ······························································································································· 7

° FOCUSING ······························································································································· 8

• Changing the Focus Mode ···································································································· 8

• Using Autofocus ···················································································································· 8

• Using Manual Focus ·············································································································· 9

• Using the Quick-Shift Focus System (

-series cameras only) ································· 10

• How to use the Quick-Shift Focus System ·········································································· 10

• Precautions on close-distance scale ··················································································· 12

° ZOOM LENS··························································································································· 13

• About the zoom ring············································································································· 14

° ATTACHING THE LENS HOOD ····························································································· 15

• Screw-on Type····················································································································· 15

• Bayonet Type······················································································································· 15

• About the PL filter window ··································································································· 16

° FILTERS ································································································································· 18

° PRECAUTIONS WHEN USING THE LENS WITH A FLASH ················································· 20

• Built-in Flash ························································································································ 20

• External Flash······················································································································ 20

• Compatibility of DA Lenses with the Built-in Flash ······························································ 21

° MAIN SPECIFICATIONS ········································································································ 22



Focusing ring

Distance scale window

Lens hood attaching index

Distance scale

Depth-of-field scale

Mounting index

Depth-of-field scale

Distance index


The DA lens does not have an aperture ring. Aperture settings are controlled automatically as if set to the auto “A” position, so accessories without an auto “A” setting cannot be used with this lens.


About the DA lens mount

The DA lens is an interchangeable lens specifically designed for the PENTAX - series digital SLR camera.

The K


-mount of the DA lens is similar to conventional SLR lenses, but the DA lens cannot be used on 35 mm SLR cameras.




AF coupler

Lens-information contacts


Be careful not to damage or dirty the lens-information contacts and AF coupler on the mount surfaces of the camera and lens. Otherwise, failure or malfunction may result.






To mount the lens on the camera body

Align the red dots on the lens and camera body, and then turn the lens clockwise until it clicks into place.


• Do not hold down the lens unlock button while mounting the lens, otherwise the lens will not be properly mounted.

• After mounting the lens, gently turn the lens counterclockwise to make sure it is locked in place.


To remove the lens

Hold down the lens unlock button on the camera body and turn the lens counterclockwise.




Take off the lens cap by pressing the two tabs inward as shown above.


Attaching the dedicated lens cap to DA 40mm f/2.8 Limited

First screw the dedicated hood onto the front of the lens, then screw on the lens cap.


• When not using the lens, be sure to attach the lens cap.





Changing the Focus Mode

Use the camera’s focus mode switch to change between the autofocus mode and manualfocus mode. For details, refer to your camera’s manual.


Using Autofocus

Set to autofocus with the camera’s focus mode, and press the shutter button halfway or press the AF button of to autofocus. Above left illustaration is for .


During autofocusing, the focusing ring of following lenses will rotate.

To prevent malfunction, do not touch the focusing ring during autofocusing.

- DA 16-45mm f/4ED AL

- DA 18-55mm f/3.5-5.6 AL

- DA 40mm f/2.8 Limited




Using Manual Focus

Set to MF with the camera’s focus mode, and turn the focusing ring to focus manually.


Using the Quick-Shift Focus System ( -series cameras only)

If you use the lens with an -series camera and the focus mode is set to autofocus, you can focus manually after autofocus is achieved. Just turn the focusing ring to manually touch-up the focus. You can do this without changing the focus mode to MF.

How to use the Quick-Shift Focus System

1. Using Autofocus

Set the camera’s focus mode switch to autofocus, then press the shutter button halfway to autofocus.

With the , you can also focus with the AF button. With the , you can focus by pressing the OK button. (Assuming that the “OK btn when shooting” in the

C Custom Setting” menu is set to “2 Enable AF.”)

2. Hold down the shutter button halfway (or press the AF button or OK button),

then turn the focusing ring to focus.

3. Finally, press the shutter release button fully to take a picture.



During autofocusing, the focusing ring of following lenses will rotate.

To prevent malfunction, do not touch the focusing ring during autofocusing.

- DA 16-45mm f/4ED AL

- DA 18-55mm f/3.5-5.6 AL

- DA 40mm f/2.8 Limited

• When using the Quick-Shift Focus System, keep pressing the shutter button (or AF button) after you achieve focus and before taking a picture. If you let go of the shutter button before taking the picture, you will have to focus all over again when you press the shutter button again.

In the following cases, you can take the picture without autofocusing after letting go of the shutter button.

• With the , set the “AF with Press Halfway” Custom Function to off. To autofocus, press the AF button.

• With the , in the “C Custom Setting” menu, set “OK btn when shooting” to

3 Cancel AF.” While you press the OK button, you can focus manually.

The setting procedure and more details are explained in the camera's instruction manual.


Close-distance scale

Precautions on close-distance scale

(For DA 16-45mm f/4ED AL, DA18-55mm f/3.5-5.6 AL)

In the close-distance scale range (the distance scale in the orange area), when shooting at the maximum aperture, image quality deterioration in the picture corners may result because of the optical characteristics of the lens.

When taking a picture in this range, we recommend that you use a smaller aperture, stopping down from wide open.

Focusing index

Focusing ring

Distance scale

Zoom index

Mounting index


Lens hood attaching index

Zoom ring

Focal length scale



The zoom lens has a focusing ring at the front and a zoom ring behind it.

Turn the zoom ring to set the desired angle of view (lens focal length).


• The focusing point may shift slightly by changing the focal length. First adjust the zoom and then adjust focus.

About the zoom ring

Turn the zoom ring clockwise for telephoto and counterclockwise for wide-angle.



In order to avoid the deterioration in image quality from internal reflection, use of the lens hood is recommended.

1 2

Lens hood attaching index


Screw-on Type

If the lens hood is dedicated to the DA 40mm f/2.8 Limited, screw it onto the front of the lens.


Bayonet Type

When attaching the lens hood, align the index on the lens hood with the attaching index on the lens, and push both parts straight toward each other. Attach the lens hood on the lens by turning the hood in the clockwise direction to lock it as viewed from the front of the lens until it clicks into position.


• When attaching the lens hood, hold the focus ring and zoom ring securely to prevent them from turning.

• When the lens hood is not in use, it can also be turned around and attached in the reversed position.




About the PL filter window

If a polarizing filter is attached to the DA lens, you can easily turn the filter via the PL filter window on the bayonet-type hood.

How to use the lens hood with polarizing filter window

1. Remove the PL filter window cap by sliding it in the direction as shown above.

2. Turn the outer rim of the circular polarizing filter from the PL filter window as shown above.



3. Attach the PL filter window cap.


• When shooting, be sure the PL filter window cap is in place to make that the lens hood is being used to maximum effect.



Mount the filter into the screw thread in front of the lens.


• The compatible filter size for all the lenses are listed on pages 22-23.

Precaution on filters

• Since the filter becomes a part of the optics when attached on the lens, handle it in the same way you handle the lens with care to dust, dirt and scratches. Normally, attaching two or more filters on a lens is not recommended. However, attaching a circular polarizing filter and another filter would not be a problem.

• Use a circular polarizing filter with Autofocus camera for proper exposure and autofocusing.


Attaching the 30.5mm filter to the DA 40mm f/2.8 Limited lens

Normally, you attach the 49mm filter to the front of the lens. But as shown in the diagram, you can also screw on a 30.5mm filter to the back of the dedicated hood.

About Using a Polarizing Filter

• If you attach an older type Pentax polarizing filter to the DA 16-45mm f/4 ED AL or DA

18-55mm f/3.5-5.6 AL lens, the dedicated hood cannot be attached over the filter. Also, the hood might or might not be attachable if a non-Pentax polarizing filter is attached to the lens.

• Do not attach an older type Pentax polarizing filter to the DA 14mm f/2.8 ED (IF). The filter will cause vignetting. Instead, use the new Pentax polarizing filter which will not cause vignetting.



Built-in Flash

The built-in flash can not be used when the distance is less than 0.7m. When the flash is used within 0.7m, it causes incorrect exposure control and vignetting in the picture corners.

• Refer to the “Compatibility of DA Lenses with the Built-in Flash” chart on page 18 for information on the compatibility of the built-in flash with the lens being used. Furthermore, please note that when using the -series camera, a warning indication does not appear even when taking a picture with a built-in flash that is incompatible with the lens being used.

• If the built-in flash is used with the lens hood attached to the lens, the flash light will be blocked by the lens hood. Always make sure to remove the lens hood before using the built-in flash.

External Flash

DA 14mm f/2.8ED (IF)

The AF360FGZ external flash unit with the wide-angle panel only can be used, and the lens hood can be attached as well. Other external flash units are not recommended to use because their coverage angle is not compatible with the angle of view of the lens.

DA 16-45mm f/4ED AL, DA18-55mm f/3.5-5.6 AL, DA 40mm f/2.8 Limited

When using the external flash unit, the vignetting will not occur with the lens hood attached to the lens if the flash covers its angle up to 24 mm (equivalent in 35mm format).

For further details, refer to the operating manual for your external flash unit.


Compatibility of DA Lenses with the Built-in Flash


14mm f/2.8ED (IF)



16-45mm f/4ED AL *YES



Vignetting may occur at a focal distance less than 28mm, and also may occur at a focal distance 28mm when object distance is less than 1m.

18-55mm f/3.5-5.6 AL


40mm f/2.8 Limited





Focal length

DA 14mm f/2.8ED (IF)

14 mm

(equivalent to

21.5mm in 35mm format)

DA 16-45mm f/4ED AL DA18-55mm f/3.5-5.6 AL

16-45 mm

(equivalent to

18-55 mm

(equivalent to

24.5-69mm in 35mm format) 27.5 - 84mm in 35mm format)

Usable camera

Elements in groups 12–11

Angle of view


Mount type

Minimum focus distance

Maximum magnification

Filter size

90° f/2.8–f/22





0.17m (0.56ft)

Approx. 0.19



83°–35° f/4–f/22





0.28m (0.92ft)

Approx. 0.26




-series f/3.5-f/5.6




0.25m (0.82ft)

Approx. 0.34


77mm 67mm 52mm

Lens hood PH-RBH 77mm

Max. Diameter 83.5mm

× 69mm

× Length


× 2.7in)


PH-RBL 67mm


× 92mm


× 3.6in)

PH-RBA 52mm


× 67.5mm


× 2.6in)





(with hood 455N/16oz) (with hood 390N/13.8oz) (with hood 250N/8.8oz)

Soft case S100-120 S90-140 S80-120


Focal length

DA 40mm f/2.8 Limited

40 mm

(equivalent to

61mm in 35mm format)

Usable camera

Elements in groups 5–4


Angle of view


39° f/2.8–f/22

Mount type

Minimum focus distance

Maximum magnification

Filter size




0.4m (1.31ft)

Approx. 0.13


49mm or 30.5mm

Lens hood MH-RB 49mm

Max. Diameter 63mm

× 15mm

× Length


× 0.6in)



(with hood 100N/3.5oz)

Soft case Dedicated case



Memo :


For customers in USA


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.

Changes or modifications not approved by the party responsible for compliance could void the user's authority to operate the equipment.

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 customers in Canada

This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment


Cet appareil numérique de la classe B respecte toutes les exigences du Réglement sur le matériel brouilleur du


PENTAX Corporation

2-36-9,Maeno-cho, Itabashi-ku, Tokyo 174-8639, JAPAN (

PENTAX Europe GmbH

Julius-Vosseler-Strasse, 104, 22527 Hamburg, GERMANY

(European Headquarters) (HQ - (Germany -

PENTAX U.K. Limited

PENTAX House, Heron Drive, Langley, Slough, Berks SL3 8PN, U.K. (

PENTAX France S.A.S.

12/14, rue Jean Poulmarch, 95106 Argenteuil Cedex, FRANCE

PENTAX Benelux B.V.

(for Netherlands) Spinveld 25, 4815 HR Breda, NETHERLANDS (

(for Belgium & Luxembourg) Weiveldlaan 3-5, 1930 Zaventem, BELGIUM (

PENTAX (Schweiz) AG

Widenholzstrasse 1 Postfach 367 8305 Dietlikon, SWITZERLAND (

PENTAX Scandinavia AB P.O. Box 650, 75127 Uppsala, SWEDEN (

PENTAX Imaging Company

A Division of PENTAX of America, Inc.


600 12th Street, Suite 300 Golden, Colorado 80401, U.S.A.

(Distribution & Service Center)

16163 West 45th Drive, Unit H Golden, Colorado 80403, U.S.A.(

PENTAX Canada Inc.

1770 Argentia Road Mississauga, Ontario L5N 3S7, CANADA (



for your precious moments


The CE Mark is a Directive conformity mark of the European Community.

Printed on recycled paper.

Copyright © PENTAX Corporation 2004

05-200412 Printed in Japan

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