Nikon V1 manual 162, AGuide Number

Flash units SB-N5(0 59): The SB-N5 has a Guide Number of 8.5/27.9 (m/ft, ISO 100, 20 °C/68 °F; Guide Number at ISO 200 is 12/ 39.4). When mounted on the Nikon 1 V1, it supports i-TTL and manual flash control (0 148).

AGuide 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-N5 has a Guide Number of 8.5 m or 27.9 ft (35 mm zoom head position); its range at an aperture of f/5.6 is 8.5÷5.6 or about 1.5 meters (or in feet, 27.9÷5.6=approximately 5 ft). For each twofold increase in ISO sensitivity, multiply the Guide Number by the square root of two (approximately 1.4).

Power sources • Rechargeable Li-ion Battery EN-EL15 (0 12–15): Additional EN-EL15 batteries are available from local retailers and Nikon-authorized service representatives.

•Battery Charger MH-25(0 12): Recharge EN-EL15 batteries.

•Power Connector EP-5B, AC Adapter EH-5b: These accessories can be used to power the camera for extended periods (EH-5a and EH-5 AC adapters can also be used). An EP-5B power connector is required to connect the camera to the EH-5b,EH-5a, or EH-5; see page 166 for details.

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