He left it on a fixed aperture, so that as the light faded, the exposure got ever longer.
Light entering through a lens is focused through an aperture and exposure is controlled by a shutter.
The aperture is used to focus different wavelengths of light in different parts of a scene onto a detector.
The sensor is a flexible copper-plated sheet patterned with small squares that capture various light frequencies all at once, functioning like one big aperture.
And with its bright, F2.8 aperture, the lens performs beautifully in low-light shooting.
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One stop of light is usually defined as halving or doubling the amount of light entering the camera, depending on the shutter speed, aperture, or ISO changes made.
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Using the camera's Smart Mode, users can choose from 14 different settings, such as Creative Shot, Landscape, Light Trace or Action Freeze which will automatically adjust parameters such as aperture and shutter speed in order to obtain the best shot possible for the desired situation.
The great advantage of a more light-sensitive camera is that you can make radical adjustments to the aperture, allowing filmmakers to indulge in what's become known as "bokeh porn" shallow depth-of-field shots in which sharply defined subjects are placed against artily smeared backgrounds.
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Since aperture plays a part in exposure, it's important to understand "stops of light, " a measurement of the amount of light entering the camera.
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Offering a fixed 50mm focal length and extra-bright F1.4 aperture, the premium lens is an ideal choice for quality-critical portraiture and low-light shooting.
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