Ideally, a hydrogen fuel-cell vehicle has no environmental impact. Energy is produced by combining hydrogen with oxygen pulled from the atmosphere, and the tailpipe emission is water. The hydrogen fuel could come from a number of sources (Iceland recently started pulling it out of the ground).
A fast shutter speed such as 1/400th of a second will produce a series of crisp frames that have a choppy look when played back. A slow shutter speed such as 1/30th of a second, on the other hand, will produce a series of slightly blurred frames that have a smoother look when played back.
Different combinations of shutter speed and aperture used to achieve the same exposure. Shutter speed: Speeds faster than one second are shown as fractions (e.g.: â¦1/125, 1/160, 1/200, 1/250â¦). Some cameras may omit the numerator so that â1/125â becomes â125,â â1/250â becomes â250,â etc.