focusing ring

基本解釋

"By focusing on the glow of the ring's cool dust, Spitzer made it easy to find, " said Verbiscer.
Verbiscer補充道：“通過專注于寒冷塵埃的熱輻射，斯皮策望遠鏡能方便的發(fā)現(xiàn)它們?！?br>www.astronomy.com.cn
With the structure, the focusing ring can be quickly clamped on the optical mode lens; and assembly and disassembly are convenient and positioning is accurate.
由于本實用新型采用了上述結(jié)構(gòu)，調(diào)焦環(huán)可快速地卡裝在光模鏡頭上，拆裝方便、定位準確。
ip.com
We investigate the dependence of the focusing contribution on the order m of local ring of underlying traditional Fresnel zone plate.
在本文中，我們討論了聚焦貢獻對潛在的傳統(tǒng)菲涅耳波帶片上的環(huán)的階次的依賴性。

It is possible to use the focus ring for focusing just like an SLR camera.
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Additionally, it features a macro switching ring on the lens barrel which instantly shortens the minimum focusing distance to approximately 20cm (from image plane), allowing the camera to capture small, close-up subjects with exquisite detail.
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In macro mode, which can be set by pushing the zoom ring forward while depressing the macro button on the side of the lens, focusing is possible between 8 and 20 inches for close-up shooting with a maximum image magnification of 0.72X (35mm camera equivalent).
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