Noise is reduced when working at high sensitivity ISO setting.
减少色噪,当工作在高敏感性iso设置时。
ISO is a rough measure of sensitivity to low light.
ISO大致是在暗光下对光的敏感程度。
If star trails are desired, using a large aperture and higher sensitivity (ISO 200-400) can enhance the brightness of each streak.
如果需要星光轨迹,那么使用大光圈和较高感光度(ISO 200 - 400)就能提高每条轨迹的亮度。
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