Nikon D3X User Manual
Page 214
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Guide Number
To calculate the range of the flash at full power, divide the Guide Number
by the aperture. For example, at ISO 100 the SB-800 has a Guide Number
of 38 m or 125 ft.; its range at an aperture of f/5.6 is 38÷5.6 or about 6.8
meters (or in feet, 125÷5.6=23 ft. 7 in.). For each twofold increase in ISO
sensitivity, multiply the Guide Number by the square root of two
(approximately 1.4).
See also other documents in the category Nikon Photo Accessories:
- D70 (218 pages)
- ONESHOT360 360TM (2 pages)
- AC-2WE (65 pages)
- 1000MM (27 pages)
- os Speedlight SB-102 (36 pages)
- COOLSCAN V ED (2 pages)
- 35MM Film Scanner LS-10E (82 pages)
- Camera Lens (33 pages)
- AF Zoom-Nikkor (2 pages)
- Circular Polarizing Filter II (2 pages)
- 35mm SLR (2 pages)
- COOLPIX 5000 (2 pages)
- COOLPIX 5000 (4 pages)
- SD-9 (155 pages)
- AF-S DX (104 pages)
- AF-S DX (2 pages)
- AF-S VR (71 pages)
- AI-S Micro-NIKKOR 200mm f-4 IF (27 pages)
- MB-D11 (332 pages)
- AF-S Nikkor (2 pages)
- DR-4 Right Angle Viewfinder (2 pages)
- AF 35mm f-2D (2 pages)
- SK-9 Speedlight Bracket Set (1 page)
- AF Nikkor 85mm f/1.4D IF (2 pages)
- EN-EL4 Rechargeable Battery D2H D2Hs D2X (2 pages)
- MB-D100 (4 pages)
- AF-S DX NIKKOR (80 pages)
- MB-D10 (150 pages)
- MB-D10 (155 pages)
- 28-200mm f/3.5-5.6D IF (2 pages)
- MB-D80 (138 pages)
- AF ZOOM-NIKKOR AFF3AF (2 pages)
- Zoom-Nikkor ED 80-200mm f/2.8 (31 pages)
- AF-S TC-20E III (148 pages)
- COOLSCAN IV ED (2 pages)
- AF 18mm f-2.8D (2 pages)
- EN-EL8 Li-Ion rechargeable (2 pages)
- 70-300mm f/4-5.6G AF Nikkor SLR 1928 (5 pages)
- 50mm f/1.4G (100 pages)
- 55-300 (140 pages)
- AF-S DX NIKKOR 18-55mm f/3.5-5.6GVR ED (104 pages)
- AF DC-Nikkor 105mm f/2 D (5 pages)
- D610 (368 pages)
- D4S (500 pages)
- D4S (100 pages)