英语词汇“focusing tube”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

C1. General attributive. Designating devices and equipment used to bring images into focus, as focusing frame, focusing tube, etc.Recorded earliest in focusing screen at screen n.¹ 26.

ΚΠ

1852 Athenæum 23 Oct. 1130/1 (advt.) French-polished mahogany camera, with Double-action Sliding Front, Focussing Screen, and two Double Frames for paper.

1856 Mechanics' Mag. 8 Mar. 225/1 The focus is obtained in the most convenient manner, by means of a screw, the head of which projects beneath the focusing tablet.

1883 Photogr. Times July 314/1 The system has been advocated of using a plain glass instead of a ground glass in the focusing frame.

1903 Photogr. News 4 Dec. 793/1 The automatic focussing gear abolishes focussing and enables the operator to see his picture clearly when adjusting it for size.

1973 Pop. Mech. Jan. 56 Instead of a bellows close-up attachment for my single-lens reflex, I built an adjustable focusing tube—from junk parts.

2015 J. Gerlach & B. Gerlach Digital Nature Photogr. vi. 98/2 A focusing rail is a second and perhaps a better way to accomplish the focus changes.

单词	focusing tube
释义	> as lemmas focusing tube C1. General attributive. Designating devices and equipment used to bring images into focus, as focusing frame, focusing tube, etc.Recorded earliest in focusing screen at screen n.¹ 26. ΚΠ 1852 Athenæum 23 Oct. 1130/1 (advt.) French-polished mahogany camera, with Double-action Sliding Front, Focussing Screen, and two Double Frames for paper. 1856 Mechanics' Mag. 8 Mar. 225/1 The focus is obtained in the most convenient manner, by means of a screw, the head of which projects beneath the focusing tablet. 1883 Photogr. Times July 314/1 The system has been advocated of using a plain glass instead of a ground glass in the focusing frame. 1903 Photogr. News 4 Dec. 793/1 The automatic focussing gear abolishes focussing and enables the operator to see his picture clearly when adjusting it for size. 1973 Pop. Mech. Jan. 56 Instead of a bellows close-up attachment for my single-lens reflex, I built an adjustable focusing tube—from junk parts. 2015 J. Gerlach & B. Gerlach Digital Nature Photogr. vi. 98/2 A focusing rail is a second and perhaps a better way to accomplish the focus changes. extracted from focusingn. < as lemmas
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> as lemmas