









Focal length
That cone Angle is directly controlled by the focal length.
This is the ratio of the focal length of the telescope to its aperture.

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Open the tool →焦距 (jiāo jù) means “Focal length”.
焦距 is pronounced jiāo jù in Mandarin Chinese.
“Focal length” is 焦距 (jiāo jù) in Chinese.
This page has 2 example sentences using 焦距, each with pinyin and an English translation.