This Sunpak flash is very powerful and competes well with Nikon flashes. This flash was designed for use with film cameras and is compatible with N50, N70, N90, N90S, F4, F5 and others in TTL mode. It will work with any Nikon SLR or other with a shoe mount, including digital. To work with a digital camera, the TTL does not work. It works with the exposure sensor built-in on the flash. You select a range and set the f stop to the recommended setting and shoot.
Guide number is feet with maximum is 180, normal mid range zoom is 140.
The zoom head will cover 28, 35, 50, 70, 85, 105 and 135mm. There is a built-in autofocus sensor to light the subject in a dark situation for metering.
Uses 4 AA Alkaline batteries not included.