> as lemmas
telenegative lens
tele-negative n. and adj.
Brit. 
/ˌtɛlᵻˈnɛɡətɪv/
, /ˌtɛlᵻˈnɛɡətɪv/U.S. /ˌtɛləˈnɛɡədɪv/
[after German Telenegativ (1897 or earlier)] Optics (a) n. a strongly diverging compound lens, esp. (in later use) one which serves as a component in a telephoto lens, or which is used with an astronomical eyepiece to magnify the image (cf. Barlow lens n. at Barlow n. 1); (b) adj. designating a compound lens of this type (chiefly in telenegative lens); having the property of such a lens.Cf. tele-positive n. and adj./ˌtɛləˈnɛɡədɪv/ΘΚΠ
society > leisure > the arts > visual arts > photography > camera > parts and accessories of camera > [adjective] > types of lens
flat field1841
wide-angle1865
slow1867
wide-angled1873
fast1877
rapid1878
fish-eye1882
sharp1883
symmetrical1890
telephotographic1891
telephotographic lens1891
narrow-angle1893
stigmatic1896
tele-negative1898
tele-positive1898
bloomed1945
soft1945
wide-field1950
1898 Year Bk. Photogr. 18 (table) Zeiss' Tele-Objectives... Tele-Negative 1:2.
1901 Photo-miniature May facing p. 56 (caption) Combination consisting of Zeiss Series VIIa, No. 8, and Tele-negative System of 3-in. focus.
1955 J. B. Sidgwick Amateur Astronomer's Handbk. viii. 145 Telenegatives were used before the development of the telephoto lens to increase the plate-scale of camera objectives, and are still to be found on the second-hand market.
2005 M. B. Pepin Care Astron. Telescopes & Accessories v. 82 (caption) The design incorporates a telenegative element and has 10-mm eye relief.
2014 N. English Grab 'n' go Astron. v. 78 This [sc. a Barlow lens] is usually a two-element tele-negative lens that amplifies any eyepiece magnification by a factor of anywhere between 1.5× and 5×.
<
as lemmas