Divide the guide number by your lens' aperture setting ... (18mm), but much more uniform at telephoto (55mm). For our Indoor Portrait scene test, the Nikon D3100's flash required +1.0 EV exposure ...
As with most DSLRs, the Nikon D3100 has an optical viewfinder that lets you view your subject through the lens. Unlike the D3000, the Nikon D3100 also offers Live View mode which allows you to ...
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