尼康数码相机-SB-25说明书.pdf

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SB-25_En 03.1.14 8:18 PM Page 1 Autofocus Speedlight Instruction Manual E

SB-25_En 03.1.14 8:18 PM Page 2 FOREWORD Thank you for purchasing the Nikon Autofocus Speedlight SB-25. Used with Nikon’s newest SLRs (F90-Series/N90, F4-Series, F-801/N8008, F-801s/N8008s, F-601/N6006, F-601M/N6000, F-401x/N5005, F-401/N4004 and F-401s/ N4004s), it offers you the most advanced and complete system for automatic flash photography available. To get the maximum performance from your new SB-25, be sure to take time to read the instruction manual carefully. The Nikon N90, N8008, N8008s, N6006, N6000, N5005, N4004 and N4004s are sold exclusively in the U.S.A. The Nikon N2020 and N2000 are sold exclu- sively in the U.S.A. and Canada. For Effective Use of This Manual Using this manual is simple. Read the pages with shaded index tabs indicating your camera name. These index tabs lead you to all of the information you need to learn about using the SB-25 with your camera. The SB-25 and today’s newest Nikon models offer exceptionally high performance. They include more features than ever before, all of which can help you make great pic- tures. Because there are so many features, the instruction man- ual is extensive, and may seem a little intimidating. We urge you, however, to thoroughly read the manuals before you begin using the SB-25. That way you will be fully familiar with the features and the way they work. For the convenience of latest Nikon SLR users, the SB-25 offers automatic adjustment functions when used with cer- tain lenses. Automatic operations is detailed beside manual operation in shaded boxes with mark. By becoming thoroughly familiar with the SB-25, you will be able to use its advanced features more effectively and enjoy great results from the very beginning. F90-Series/N90 Users F4-Series, F-801/N8008 and F-801s/N8008s Users F-601/N6006 and F-601M/N6000 Users F-401x/N5005 Users F-501/N2020 and F-301/N2000 Users F-401/N4004 and F-401s/N4004s Users FA, FE2, FG and Nikonos V Users F3-Series, F2-Series, FM2 and FG-20 Users

SB-25_En 03.1.14 8:18 PM Page 4 Table Of Contents FOREWORD For Effective Use of This Manual.....................................2 Table of Contents ....................................................4 — 5 Chapter 1: Introducing the SB-25 Autofocus Speedlight Nomenclature...........................................................8 — 9 Main Features/Functions — SB-25’s Flash Capabilities ..............................10 — 17 Fully Automatic Fill Flash ...................................10 — 13 Automatic Balanced Fill-Flash .............................11 “TTL Multi-Sensor” Automatic Balanced Fill-Flash With F90-Series/N90 ........................12 FP High-Speed Sync Flash..................................13 — 14 Rear-Curtain Sync Flash ..............................................15 Red-Eye Reduction Control...........................................16 Repeating Flash..........................................................16 SB-25 Feature Comparison: Flash Operations Available with Your Camera .....................................17 Chapter 2: Before Flash Shooting WARNING — TO AVOID INJURY..................................20 CAUTION — TO PREVENT DAMAGE TO THE SB-25 SPEEDLIGHT ..........................................20 Getting Started — SB-25 Set-Up........................20 — 23 Selecting Measurement System, Meters or Feet ........................................................21 Installing Batteries ............................................21 — 22 Attaching Flash Unit to the Camera Accessory Shoe.............................................22 — 23 Checking Battery Power ..............................................23 Adjustment Functions — Using LCD Panel and Built-in Functions .....................................24 — 30 Adjusting Flash Head To Horizontal/ Front Position ...............................................24 — 25 Using LCD Panel For Shooting- Distance Computation....................................26 — 30 Setting ISO Film Speed (Manual Adjustment)...............................27 — 28 Setting Aperture Value (Manual Adjustment)...............................28 — 29 Setting Zoom-Head Position (Manual Adjustment)...............................29 — 30 Chapter 3: Shooting Practice in Flash Modes TTL Auto Flash Mode — Fill-Flash with Automatically Compensated Flash Output ...32 — 79 For F90-Series/N90 Camera Users: Choosing A Flash Method/Set Up and Practice......33 — 39 For F4-Series, F-801/N8008 and F-801s/N8008s Users: Choosing A Flash Method/Set Up and Practice......40 — 47 For F-601/N6006 and F-601M/N6000 Users: Choosing A Flash Method/Set Up and Practice......48 — 56 For F-401x/N5005 Users: Choosing A Flash Method/Set Up and Practice......57 — 63 For F-501/N2020 and F-301/N2000 Users: Choosing A Flash Method/Set Up and Practice......64 — 69 For F-401/N4004 and F-401s/N4004s Users: Choosing A Flash Method/Set Up and Practice......70 — 75 For FA, FE2, FG and Nikonos V Users: Choosing A Flash Method/Set Up and Practice......76 — 79 Chapter 4: Flash-Shooting Applications FP High-Speed Sync Flash — Flash Photography At Higher Shutter Speeds .............................98 — 103 Guide number in FP High-Speed Sync Flash .....102 — 103 Red-Eye Reduction Control — For Better Flash Portraits..........................................................104 Rear-Curtain Sync Flash — For Natural Light Flows...............................................................105 Flash Exposure Compensation — To Make Flash- Illuminated Subject Lighter or Darker........106 — 107 Exposure Compensation with Camera’s Dial — To Make Background Lighter or Darker....108 — 109 — For Test Firing ................110 Open Flash Button Built-In Wide Flash Adapter — For Shorter Focal-Length Lenses...............................................111 Zoom-Lock Capability — To Fix Zoom-Head Position .........................................................112 — 113 Trouble With Wide Flash Adapter ............................113 AF Assist LED — Autofocus Flash Photography in Dim Light ..................................................114 — 115 Power Switch Standby (STBY) Position — To Conserve Energy and Shorten Recycling Time ..............................116 — 117 Non-TTL Auto Flash Mode — Shooting with Varied Lens Apertures.............................80 — 83 Manual Flash Mode — Manual Light- Output Control .................................................84 — 89 Synchronization in Continuous Shooting........................89 Repeating Flash Mode — For Multiple Guide Number — To Calculate a Proper Aperture....................................................118 Diffusing Light — To Soften Harsh Shadow ..........................................................119 —123 Bounce Flash Photography.....................................122 Using a Diffuser ....................................................123 Exposure...........................................................90 — 95 Close-Up Flash Photography in TTL Auto Flash Mode — To Flash On A Very Close Subject .............................124 — 125 Multiple Flash Photography — Using More Than One Speedlights .................................126 — 132 TTL Multiple Flash Photography ..................128 — 129 Manual Multiple Flash Photography ........................129 System Chart for TTL Multiple Flash ............130 — 131 Accessories for TTL Multiple Flash..........................132 Chapter 5: Notes on Speedlight “Red Eye” .....................................................................134 Flash Sync Mode Selector vs. Position.....................................................................135 Tips on Speedlight Care..................................136 — 137 About Batteries............................................................138 Specifications ..................................................139 — 141 Usable Aperture/Flash Shooting Distance Ranges In TTL Auto Flash Modes.............................................................142 And Non-TTL 4 5

SB-25_En 03.1.14 8:18 PM Page 6 Chapter 1 6 Introducing the SB-25 Autofocus Speedlight

SB-25_En 03.1.14 8:18 PM Page 8 Nomenclature Built-in diffuser card Built-in wide flash adapter Battery chamber lid Slide and lift to open. Flash head tilting lock release lever Meter/Feet select lever (inside battery chamber) Battery chamber Accepts four 1.5V AA-type penlight batteries, either 1.5V alkaline-manganese or 1.2V NiCd batteries (voltage for NiCd batteries varies depending on manufacturer; maximum permitted is 1.5V). 8 Flash head Locks at the front position and the 90˚ position; tilts up to 90° and down to –7°; rotates 90° to the right and 180° to the left. Autofocus assist illuminator LED Enables autofocus operation in dim light or total darkness. Light sensor for Non-TTL Auto Flash operation In Non-TTL Auto Flash operation, be careful not to cover or otherwise obstruct the sensor. External power source terminal Accepts power cord of Nikon DC unit SD-8/SD-7. Mounting foot locking wheel Mount pin Hot-shoe contacts Mounting foot Tilting angle scale Rotating angle scale Terminal cover Keep terminal covered when not in use. TTL multiple flash terminal For TTL-exposure-control multiple flash operation. Sync/multiple flash terminal For manual-exposure multiple flash operation. Chapter 1 Flash head rotating lock release lever LCD panel See page 26. Control buttons See page 26. 9

SB-25_En 03.1.14 8:18 PM Page 10 Main Features/Functions — SB-25’s Flash Capabilities The SB-25 is a most versatile Speedlight which offers vari- ety of convenient features to enhance your flash photogra- phy. To understand these features/function will help you operate the SB-25 easily, therefore, enjoy more options and creative possibilities. Each of following topics cover particu- lar Nikon SLR models: • Fully Automatic Fill Flash: F90-Series/N90, F4-Series, F-801/N8008, F-801s/N8008s, F-601/N6006, F-601M/ N6000 and F-401x/N5005 Fully Automatic Fill Flash Generally performed at night or in dim light, flash photogra- phy can also be used to reduce shadows in pictures shot in bright sunlight, resulting in a pleasing, more natural effect. Using a flash this way, with ambient light, is called “fill- flash.” When used with the SB-25, many Nikon SLR cam- eras provide Automatic Balanced Fill-Flash, to automatically keep flash brightness in balance with the ambient light. • Standard TTL Flash: F90-Series/N90, F4-Series, F-801/N8008, F-801s/N8008s, F-601/N6006, F-601M/ N6000, F-501/N2020, F-301/N2000, F-401/N4004, F-401s/N4004s, FA, FE2, FG and Nikonos V • FP High-Speed Sync Flash: F90-Series/N90 • Rear-Curtain Sync Flash: F90-Series/N90, F4-Series, F-801/N8008, F-801s/N8008s, F-601/N6006 and F-601M/N6000 • Red-Eye Reduction Control: F90-Series/N90 • Repeating Flash: All the Nikon SLR models covered in this manual Chapter 1 Automatic Balanced Fill-Flash Thanks to a computer-controlled exposure meter (multi- segment sensor) and TTL (through-the-lens) sensor, shutter speed, aperture, and even flash output can be automatically controlled to keep both subject and background in correct exposure. In Matrix Balanced Fill-Flash, the camera’s Matrix Metering System (i.e., multi-segment sensors) determines the correct exposure based on ambient light. Flash output is then controlled with the center-bottom-weighted TTL sen- sor which monitors light reflection from the film surface and regulates timing to terminate output in realtime with flash illumination. This way, flash illumination brightens the scene (mainly foreground subject), but does not overpower the ambient light exposure (background). The result is brighter shadows, sharper details and more vivid colors. Matrix Balanced Fill-Flash operates in virtually all light conditions within the camera’s metering range and available synchronized shutter speeds. Operation is fast and automatic, while it allows manual operation for exposure compensation techniques to vary fill-flash effects. Center-Weighted Fill-Flash operates when you switch the metering system to Center-Weighted. This metering system measures the entire scene and emphasizes its read- ing on the center area. By pointing the center-weighted area at different parts of the scene, you can choose which brightness level you want for basic available-light exposure. By selecting Spot Metering System, Spot Fill-Flash oper- ates in a similar manner as Center-Weighted Fill-Flash, although the meter reads a narrower center area, or “spot.” 10 Matrix Balanced Fill-Flash 11

SB-25_En 03.1.14 8:18 PM Page 12 “TTL Multi-Sensor” Automatic Balanced Fill- Flash with F90-Series/N90 After you depress the shutter release button and prior to the shutter being activated, the SB-25 fires a series of nearly invisible preflash, or Monitor Preflash. These preflash are detected by the F90-Series/N90’s TTL multi-sensor, analyzed for brightness and contrast, then integrated with distance information from the lens (D-type Nikkor) and other exposure control information for a bal- anced fill-flash exposure. 3D Multi-Sensor Balanced Fill-Flash can be performed with any built-in metering system, and is most effectively used to achieve correct exposure in scenes that include: • A mirror, white wall or other surface with extremely high With non-D-type AF or AI-P Nikkor lenses, Multi-Sensor Balanced Fill-Flash will be performed. Although the TTL multi-sensor does not process distance information, the advanced sensor system generally provides superior results to Matrix Balanced Fill-Flash. • Obstacle(s) in front of subject you wish to avoid • Sunlight • Subject against an “infinite” background (empty sky, reflectivity clouds, etc.) Chapter 1 Main Features/Functions FP High-Speed Sync Flash The SB-25 is capable of flash synchronization at shutter speeds of 1/250 sec. or faster when used with the new F90- Series/N90. Unlike other flash synchronization methods, the flash consecutively emits light at an extremely rapid cycle and exposure begins with the opening of the front (first) cur- tain and ends with the closing of the rear (second) curtain. Standard TTL Flash It is possible to manually select a flash compensation level instead of having the computer do it automatical- ly. Simply press the SB-25’s button to cancel Automatic Balanced Fill-Flash. The camera’s computer-controlled TTL flash sensor detects the total amount of light passing through the lens and reflected from the film surface. The system controls flash output so that the combination of ambi- ent light and flash illumination will result in a correct exposure. Under bright-light conditions, the flash is automati- cally controlled to provide less light; under dim light conditions, it will produce more light. This system is not designed to automatically provide a balance between flash and ambient light; it is limited to efficient operation in dim-light conditions and is not recommended for use in very bright lighting condi- tions. This system does not directly link the ambient light meter and the flash’s TTL meter. 3D Multi-Sensor Balanced Fill-Flash photography: particularly effective for subject standing against a shiny object. 12 FP High-Speed Sync Flash: Allows a wider aperture, thus, shallower depth of field for a blurred background. 13

SB-25_En 03.1.14 8:18 PM Page 14 The combination of high shutter-speed range and flash sync capability provides you with more options for flash photography in day-light conditions. It enables you to use a wider aperture to blur the subject’s background (create a shallow depth of field), light up shadowed areas in outdoor photography, or even create light flow for fast moving sub- jects. FP high-speed sync flash is only available in the SB-25’s Manual flash mode when using the F90-Series/N90. For details, see “FP High-Speed Sync Flash — Flash Photography At Higher Shutter Speeds” on page 98. SB-25 sync flash Y Light output Y Y F R F R F R X X X 1 FP High-Speed Sync Flash 2 2 Front-curtain sync flash Rear-curtain sync flash 14 X: Time duration Y: Shutter curtain movement : Front-curtain movement : Rear-curtain movement 1: Film surface is exposed to flash light throughout the entire duration. 2: Film surface is exposed to flash light for only part of the time that the curtain are open. Rear-Curtain Sync Flash In “normal” flash synchronization, the flash fires at an early stage of exposure (i.e., front-curtain sync). At slow shutter speeds with a moving subject, this results in unnatural light patterns. For more natural lighting, use Rear-Curtain Sync. With this method, the flash fires at a later stage of the exposure, just before the rear, or second, shutter curtain starts to close (i.e., rear-curtain sync), turning available light into a stream of light that follows the flash-illuminated moving subject. Rear-Curtain Sync is available with the F90- Series/N90, F4-Series, F-801/N8008, F-801s/N8008s, F-601/N6006 and F-601M/ N6000. For more details, see “Rear-Curtain Sync Flash — For Natural Light Flow,” page 105 and “Flash Sync Mode Selector ,” page 135. vs. Chapter 1 Main Features/Functions A slow shutter speed could create light flow from a moving subject. Rear-Curtain Sync Flash catches him/her with natural-looking light stream. 15

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