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怎样虚化背景，凸显主题
| 1. Lens wide open: With wide aperture.
for example lower than F4, you can narrow depth of the focus and
blur the background of the photo. 大光圈：光圈大，背景越虚。F4以下都算大光圈。如：f3.5 f2.8 f1.8等等。一般用相机镜头的大光圈中心对焦，焦点在主体上2。 Canon 6D ISO 200, F3.2, 1/80 Sec. 90MM |
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| 2. Longer lens and close to
the subject: Narrow the depth of field further by zooming in. To
make as shallow a depth of field as possible, use a long/telephoto lens
set on maximum zoom. Stand as close to the subject as possible. 可以用长焦距近距离拍摄主题。 不是所有的情况都适合大光圈虚化。如果不能使用大光圈，我们就要使用长焦，尽可能靠近主体。俗话：光圈不够，长焦来凑；摄距越近，背景越虚。 Sony A6000 ISO 125, F/6.5 1/350 Sec. 210MM |
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3. More distance between subject and background. More
distance subject to background, more blurred background. 背景尽量远离主题，也会淡化背景. 背景的距离不能离主体太近，否则再怎么虚化也虚化不了多少。另外背景的颜色和明暗最好都和主体不同才能突出主体，所以合适的角度很重要。 ISO 360, F6.3 1/60 Sec. 210MM |
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| 4. Alternatively, you can also employ Photoshop. Simply select the background and use the blur filter. |
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