User manual PENTAX SMC A 300MM F/2.8, 400MM F/2.8, 600MM F/5.6 ED (IF)

[. . . ] Be sure to read the instructions that came with the desiccant before use. ) 2. When using the lens in a rain or mist, be careful not to allow it to get wet. Never use any organic solvent such as thinner, alcohol, or benzine, etc. Be careful not to let it fall, or subject it to strong shocks or pressure. [. . . ] 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. 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. Do not leave the camera with the lens cap off attached to a tripod or other rigid camera support. Have the lens inspected by a dealer every one or two years to maintain its high performance. 4 ° FOREWORD CONTENTS ° FOR SAFE USE OF YOUR LENS ··········································································· 1 ° PRECAUTIONS AND LENS MAINTENANCE ····················································· 2 ° smc PENTAX-D FA LENS ······················································································· 6 · About the Lens Mount ································································································ 7 · Camera / Lens Mount Compatibility ············································································· 8 ° MOUNTING AND REMOVING THE LENS ··························································· 9 ° FOCUSING ··················································································································· 10 · Switching the Focus Mode ······················································································· 10 · Using Autofocus ········································································································ 10 · Using Manual Focus ·································································································· 11 · Using the Quick-Shift Focus System ( -series cameras only) ························ 12 · How to use the Quick-Shift Focus System ································································ 12 ° HOW TO USE THE INFRARED INDEX ······························································· 13 ° APERTURE CONTROL ··························································································· 14 5 ° MACRO LENS ·········································································································· 16 · Magnification Scale···································································································· 17 · About the Clamp Switch ···························································································· 18 ° LENS HOOD ·············································································································· 19 ° FILTERS······················································································································ 20 · Precaution on filters ··································································································· 20 ° PRECAUTIONS WHEN USING THE LENS WITH A FLASH··························· 21 · Built-in Flash ·············································································································· 21 ° MAIN SPECIFICATIONS ························································································ 22 6 smc PENTAX-D FA LENS Front-ring threads Distance scale Focusing ring Aperture ring Depth-of-field scale Aperture-A-lock button 7 About the Lens Mount The D FA lens mount is called the "KAF - mount. " This lens mount enables autofocus and autoexposure. KAF-mount AF coupler Lens information contacts CAUTION Be careful not to damage or dirty the lens information contacts and AF coupler on the mount surface of the lens. Otherwise, failure or malfunction may result. 8 Camera / Lens Mount Compatibility Pentax camera/lens mount compatibility chart is shown below. KAF2-mount which is equipped with ° Power contacts ° AF coupler ° Lens information contacts KAF-mount which is equipped with ° AF coupler ° Lens information contacts KA-mount which is equipped with ° Lens information contacts K-mount (base mount) MOUNTING AND REMOVING THE LENS 9 1 2 1. 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. Push the tabs in the directions shown by the arrows to remove the lens cap. 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. Although you can use the Custom Function menu or C Custom menu to enable camera operation while the aperture ring is not set to A, restrictions will apply. Be sure to set the aperture ring to A and set the aperture with the camera. MZ-60, MZ-30 MZ-50 16 MACRO LENS The D FA Macro 50mm f/2. 8 and D FA Macro 100mm f/2. 8 lenses enable closeup photography up to 1x magnification. Clamp Switch 17 Magnification Scale The magnification is indicated by denominators on the distance scale. For example, "1" on the magnification scale at the top will make the magnification 1/1x. If you want to set the magnification first, turn the focusing ring to set the desired magnification. Then focus the subject by moving the camera forward or back. 18 About the Clamp Switch The D FA Macro 50mm f/2. 8 and D FA Macro 100mm f/2. 8 lenses are equipped with a Clamp switch which is convenient for manual focus. You can use it when taking close-ups with a copy stand, for example. Using the Clamp Switch Focus manually, then set the Clamp switch to ON. · Do not turn the focusing ring forcibly while setting the Clamp switch to ON because there is a slight possibility that the point of focus may change. · If you use the Clamp switch with any of the following cameras, be sure to first set the camera's focus mode switch to MF. Z-10, Z-20, Z-20P, Z-50 P, Z-70P, MZ-5, MZ-10, and MZ-50 LENS HOOD 19 Using a lens hood is recommended to block stray light from entering the lens. The stray light's internal reflections degrade the image quality. Lens hood for D FA lens How to attach Put the hood on the lens, and turn it as shown by the arrow until it clicks in place. Memo: · When the lens hood is not in use, it can also be turned around and attached in the reversed position. 20 FILTERS The filter is mounted into the screw thread in front of the lens. 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. Avoid using more than one filter, unless it is a circular polarizing filter. [. . . ] Avoid using more than one filter, unless it is a circular polarizing filter. Using two or more filters will degrade the image quality and the filter effect will not be obtained. · Use a circular polarizing filter with Autofocus camera for proper exposure and autofocusing. PRECAUTIONS WHEN USING THE LENS WITH A FLASH Built-in Flash 21 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. [. . . ]