Nikon SB-28 To calculate the correct aperture, To calculate the shooting distance

Page 56

Guide Numbers for determining correct aperture in

Guide numbers help you determine a correct exposure or proper aperture (f/stop) when using the SB-28 in the Manual ƒ or Repeating Flash " mode.

• See page 51 for % guide numbers.

The guide number represents the amount of light (ISO 100: for m/ft) generated by the flash. With the SB-28, you can calculate a correct aperture by using the following equation and the guide number table.

To calculate the correct aperture:

Guide number (GN)

f/stop (aperture) = ——————————————

Flash shooting distance (m/ft)

To calculate the shooting distance:

Guide number (GN)

Flash shooting distance (m/ft) = ——————————

f/stop (aperture)

Guide numbers (at ISO 100: for m/ft at 20C/68F) in ƒ and " modes

Flash output

 

 

Zoom-head position

 

 

 

 

 

 

 

 

 

 

level

18mm

20mm

24mm

28mm

35mm

50mm

70mm

85mm

1/1 (full)

18/59

20/66

30/98

32/105

36/118

42/138

48/157

50/164

 

 

 

 

 

 

 

 

 

1/2

12.7/42

14/46

21/69

22.5/74

25.5/84

30/98

34/112

36/118

 

 

 

 

 

 

 

 

 

1/4

9/30

10/33

15/49

16/53

18/59

21/69

24/79

25/82

 

 

 

 

 

 

 

 

 

1/8

6.4/21

7/23

10.5/35

11.3/37

12.7/42

15/49

17/56

18/59

 

 

 

 

 

 

 

 

 

1/16

4.5/15

5/16

7.5/25

8/26

9/30

10.5/35

12/39

12.7/42

 

 

 

 

 

 

 

 

 

1/32

3.2/10

3.5/11

5.3/17

5.7/19

6.4/21

7.5/25

8.5/28

9/30

 

 

 

 

 

 

 

 

 

1/64

2.3/8

2.5/8

3.8/13

4/13

4.5/15

5.3/17

6.0/20

6.3/21

 

 

 

 

 

 

 

 

 

Guide number varies with film speed.

For example, when shooting a subject located 9m (approx. 30 ft) away at 1/1 (full) flash output, with the zoom-head position at 35mm and a film speed of ISO 100, first read the guide number from the table above. In this case, it is 36 (or 118). Then divide the guide number by the shooting distance:

f/stop = 36/9 (in meters) = 4

f/stop = 118/30 (in feet) = 3.93 = approx. 4

Therefore f/4 is the correct aperture.

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Image 56
Contents SB-28 Foreword Determine which group your camera belongs toCamera groups and available flash modes Speedlight parts LCD panel indications ˙ Non-TTL Auto Flash P.42Use only Nikon-approved equipment Tips on using this manualTake some test shots Denotes important points where caution is required About this manualContents Manual Flash ƒ Mode Two-button operations Using control buttonsOne-button operations Getting started Loading batteries Adjusting the flash head Selecting the distance scale meters/feetAttaching the SB-28 to the camera Detaching the SB-28Turning power on and off Canceling and setting the standby functionTurning the SB-28 on and off / Standby function Standby functionReplace batteries Ready-light blinks when the flash fires at maximum outputReady-light Test firing Cameras in Groups III through Setting the ISO film speedCameras in Groups I Adjusting the zoom-head position Zoom head is automatically adjustedAdjusting the zoom-head position Other camera/lens combinationsSetting the built-in wide flash adapter To change to 18mm, press the button onceSelecting a flash mode IIIBasic operation Multi-Sensor Balanced Fill-Flash Flash modes3D Multi-Sensor Balanced Fill-Flash Center-Weighted/Spot Fill-Flash Matrix Balanced Fill FlashProgrammed TTL Auto Flash Standard TTL FlashTTL Auto Flash t Mode Available flash operation in TTL Auto Flash t ModeCamera settings Monitor Preflash will not operateFlash settings Select the flash modeTTL Auto Flash t Mode Ready-light blinks when the flash fires at maximum outputNikkor lenses without a built-in CPU Applicable to cameras in Groups INikkor lenses with a built-in CPU Guide number at ISO 100 for m/ft Available flash operation in TTL Auto Flash t Mode Select the flash mode Check the shooting distanceSelect the flash mode on the camera For cameras in Group III F-601/N6006, F-601M/N6000Flash settings Press the µ button until t appears on the LCD panel With Nikkor lenses with a built-in CPU Page For F-501/N2020 and F-301/N2000 For F-401s/N4004s and F-401/N4004Flash shooting distance range TTL Auto Flash t Mode Flash settings Select the aperture Non-TTL Auto Flash ˙ ModeFor cameras in all groups Page Page Advanced operation Manual Flash ƒ Mode Adjust the flash output levelSelect the exposure mode Number of continuous flashes at six frames per sec Manual Flash ƒ ModeSynchronization in continuous shooting in Manual ƒ mode Set the exposure mode to Manual M Set the aperture Set the shutter speedSet % on the LCD panel Adjustment factors for other ISO film speeds Guide numbers at ISO 100 for meters/feetDo not use the built-in wide flash adapter Detaching the SB-28Repeating Flash Mode Maximum number of repeating flashes per frame Repeating Flash Mode Exposure compensation in Repeating Flash Mode To calculate the correct aperture To calculate the shooting distanceFlash modes Bounce flash operation Applicable to all camera groupsSelect a flash mode Tilt and/or rotate the flash headBounce flash operation Flash head tilting and rotating angleUsing the built-in bounce card Set the flash head as shown and take picturesClose-up flash operation in TTL Auto Flash t Mode Set the flash mode Close-up flash operation in TTL Auto Flash t Mode Multiple flash operation in t and ƒ flash modes Attach the main flash unit to the camera’s accessory shoe Set the flash mode of the master flash unit to t modeMultiple flash operation in t and ƒ flash modes TTL multiple flash operationSet the flash mode on all the flash units to t SU-4System chart for TTL multiple flash For cameras in Groups I through VI, plus F3-Series camerasSecondary flash unit Usable optional remote cords Follow the same procedure as in normal Manual flash ƒ modeManual multiple flash operation For cameras in all groups Exposure compensation in flash photography Flash exposure compensation in TTL Auto Flash t mode Exposure compensation in flash photographyCanceling exposure compensation Set the desired exposure compensationFlash exposure compensation in TTL Auto Flash t mode Flash exposure compensation in Non-TTL Auto Flash ˙ mode Flash exposure compensation in Manual Flash ƒ modeSetting your camera to red-eye reduction Red-eye reduction controlRear-curtain flash sync Rear-curtain flash sync Additional information Checking the correct exposure Autofocus flash operation in dim light For autofocus cameras onlyAutofocus flash operation in dim light Hold down the µ button as you press the buttonOptional accessories Accessories for multiple flashUsable sync cords Optional accessoriesConnecting the SB-28 to your camera using a sync cord Use only Nikon-approved external power sources Available external power sourcesUsing an external power source Tips on Speedlight care Page Page Troubleshooting Troubleshooting Flash ready-light in the cameras viewfinder will blinkSpecifications Specifications ON/OFFExternal Type alkaline Number Batteries Min. recycling Approx g 11.3 oz ISO film speed Shooting distance range in feet
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SB-28 specifications

The Nikon SB-28 is a venerable speedlight flash that has become a classic among photography enthusiasts, particularly those using Nikon camera systems. Released in the late 1990s, the SB-28 has cemented its place in the hearts of photographers for its robust build quality, reliability, and impressive performance in a variety of shooting conditions.

One of the key features of the Nikon SB-28 is its guide number, which measures the flash output. With a guide number of 38 (in meters at ISO 100), the SB-28 provides ample power to illuminate subjects, even at a distance. This makes it particularly suited for both portrait and event photography where good lighting is essential. The flash also offers a versatile zoom head that can adjust from 24mm to 105mm, allowing photographers to focus the light precisely when required and improving efficiency in battery usage.

The SB-28 incorporates advanced technologies that enhance its usability. One notable feature is the TTL (Through The Lens) metering capability, which allows the flash to communicate with the camera to determine the appropriate exposure settings automatically. This feature significantly simplifies the process for photographers, enabling them to focus more on composition and creativity rather than on technical adjustments.

Another commendable aspect of the SB-28 is its built-in diffuser and bounce card. The diffuser softens the light and reduces harsh shadows, while the bounce card helps to reflect light into the eyes of subjects, giving them a more natural appearance. These features elevate the quality of the images produced, making the SB-28 a popular choice for wedding and portrait photographers.

Performance-wise, the Nikon SB-28 boasts a fast recycle time, allowing photographers to shoot at a rapid pace without significant delays between flashes. It also has a comprehensive range of flash modes, including manual and automatic settings, enabling users to tailor their lighting setup to their specific needs and shooting styles.

In terms of build, the Nikon SB-28 exhibits a sturdy and reliable construction, suitable for professional use. It is designed to withstand the rigors of daily use, with a weather-resistant design that offers protection against the elements.

In conclusion, the Nikon SB-28 is a powerful and versatile flash unit that combines advanced technology with practical features, making it a valuable tool for photographers aiming for optimal results in various lighting scenarios. Its robust performance and ease of use ensure that it remains a relevant choice even years after its initial release.