The first is what is known as the 'crop factor'.

第一点就是被一些专业人士所熟知的“裁切系数”(crop factor，也称镜头焦距转换率)。

youdao

The crop factor isn't a major issue for most users, but it does have important consequences for some.

对于大多数用户来说，裁剪系数并不是主要涉及的重点，但它会给一些特定用户带来一定的影响。

youdao

With a crop factor of 1.5x or 1.6x you need special digital lenses to get true wideangle results, but these are readily available and are usually less expensive than their 'full frame' counterparts.

只有配用1.5x或1.6x镜头焦距转换率的镜头，方能获得正常的广角效果，不过也不必担心什么，这些镜头已经随处可见，并且比起全画幅的要便宜不少。

youdao

Strong, intimate stories are the common factor in the latest crop of films coming from the country's emerging directors.

BBC: Turkey's art house film-makers hope for further success

Another long-term factor is the biofuels industry, which consumes roughly a third of the U.S. corn crop buoying prices and has government support behind it.

WSJ: Farm Economy Bounces Back