positive lens

基本解释

A long working-distance objective was designed which consists of a larger positive power lens and a smaller negative power lens.
物鏡爲長工作距物鏡，由光焦度較大的正光組和光焦度較小的負光組組成。
The third lens group (G3) comprises at least a negative meniscus lens (L33) and a positive lens (L32) sequentially from a side closest to images.
第3透鏡組（G3），從最靠像側起依次至少具有負的彎月形的透鏡（L33）、和正透鏡（L32）。
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Results showed that there were significant differences between the two methods in terms of positive spherical lens value, negative spherical lens value and column lens value (P0.01).
結果顯示：兩種方法測得負球鏡值、正球鏡值、柱鏡值均有顯著性差異（P0 .0 1）。

An alternative approach is to appeal to the classical Greek philosophy that views kindness through the lens of reason, emphasizing the positive effects acts of kindness have not just on the receiver of kindness but to the giver of kindness as well, not for the salvation of the soul in the afterlife, but in this life.
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While retaining the same smooth AF motor (SAM) as its predecessor, newly-designed rear lens elements suppresses flare and ghost, while mechanical elements have been upgraded for more positive, comfortable operation.
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