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guide number

[摄] 闪光指数

Guide Number（闪光指数）：用来标注闪光灯输出功率的参数。闪光灯指数越高，闪光灯的光照能力越强。

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闪光灯指数

因为你要明白到它们内置闪光灯的涵盖范围，最多只能够涵盖到28mm，而且本身的闪光灯指数 ( Guide Number ) 也十分微弱。坦白说唔好话16-45mm镜头，有时18-55mm镜头在广阔焦距上，都会有同样的问题。

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abstract: The guide number for an electronic flash measures its ability to illuminate the subject to be photographed at a specific film or sensor sensitivity and angle of view. A higher guide number indicates a more powerful flash.

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I used to be a campus tour guide, and what I'd say is, you know, everyone uses a number.

我以前是校园的导游，我要说的是，每个人都用数字。

求学热十足的学校 - SpeakingMax英语口语达人

The rest of the UK has had one of the best years on record for bathing water quality in the Marine Conservation Society (MCS) guide, but the number of Scottish beaches rated as excellent dipped by 5% from the 2011 figure.

BBC: Good Beach Guide rankings washed out by Scottish downpours
Moreover, if the past few months are a guide, the actual number of jobs created in July may be even lower than the figure released this week: also on Friday, the Labour Department revised its job-growth numbers for May and June down by a combined 61, 000.

ECONOMIST: Bush's jobs deficit | The
Last week he published kinder hospital rankings, which, rather like a Michelin guide, award each a number of stars, ranging from three to zero.

ECONOMIST: Hospitals

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