geometrischer Mittelpunkt des Brillenglases(the intersection of the vertical and horizontal midlines of the rectangle, in which the peripheral outline of the prescription lens is inscribed)
Maschinendrehpunkt(the intersection of the vertical and horizontal midlines of the rectangle, in which the peripheral outline of the prescription lens is inscribed)
Formscheibendrehpunkt(the intersection of the vertical and horizontal midlines of the rectangle, in which the peripheral outline of the prescription lens is inscribed)
Kittglied(a component of two or more lens elements which makes up a part of a complete optical system; also applied to separate uncemented lenses used on their own in an optical system)
Glied eines optischen Systems(simple lens; an element of a compound lens is a single uncompounded lens, i.e. a part constructed of a single piece of glass)
Aufrichtesystem(optical relay used in visual instruments for changing the orientation of the image so that the observer sees it in its proper attitude, i.e. right-handed and erect)
Objektiv mit veränderlicher Vergrößerung(providing a continuous range of magnification: by means of internal movement of the lens components with respect to each other these lenses can be changed in effective focal length and thus vary the linear magnification)
Objektiv veränderlicher Brennweite(by means of internal movement of the lens components with respect to each other these lenses can be changed in effective focal length and thus vary the linear magnification)
Objektiv mit veränderlicher Brennweite(by means of internal movement of the lens components with respect to each other these lenses can be changed in effective focal length and thus vary the linear magnification)
Gummilinse(by means of internal movement of the lens components with respect to each other these lenses can be changed in effective focal length and thus vary the linear magnification)
Objektiv veränderlicher Brennweite(by means of internal movement of the lens components with respect to each other these lenses can be changed in effective focal length and thus vary the linear magnification)
Objektiv mit veränderlicher Brennweite(by means of internal movement of the lens components with respect to each other these lenses can be changed in effective focal length and thus vary the linear magnification)