Zeiss Jena Prototype Film Lens Set, c. 1980

Carl Zeiss, Jena. Presumably for internal research purposes for the practical measurement of the theoretical maximum depth of field based on consistent front aperture application, both with a removable front iris diaphragm (all present) and due to the increased accuracy provided by attachable precision front pinhole diaphragms in the following steps: Open aperture, 4, 5.6, 8, 11, and 16 (all still sealed), all lenses with focusing, clean under point light, and with a C-mount adapter. 1) 2.8/35 mm, no. 96914, with 6 pinhole diaphragms. – 2) 2.8/50 mm, no. 88221, with 6 pinhole diaphragms. – 3) 3.5/75 mm, no. 131, with 6 pinhole diaphragms. – And: 4) 3.5/135 mm, no. 88863, with 5 pinhole diaphragms. – Previously unknown types of cine lenses, which can be considered precursors to the MicroMak lenses of 2022! Enclosed for study purposes: an optical expander (relay lens) and a TV pinhole lens 3.4/9 mm (whose basic design also originates from a government contract project in the 1950s to Zeiss Jena).

布雷克拍品等级是为了方便竞买人判断拍卖品的成色而设置的。布雷克等级用1到6级来标注外观和功能的成色，(从非常好到非常差)。 在目录图册里用括号里的2个数字来表示，前一个数字表示外观成色的级别，后一个数字表示功能成色的级别。如(3/2)表示外观成色是3(满意的)，功能成色2(好)。 成色 定义参照下列标准： 1 - 非常好 (未使用过，没有使用痕迹) 2 - 好 (新，极少的使用痕迹) 3 - 满意的 (普通的使用痕迹) 4 - 及格的 (明显的使用痕迹，某个非主要部件是后配的) 5 - 有缺陷的 (极明显的使用痕迹, 某个主要部件是后配的，功能上有缺陷，需要修理) 6 - 非常差 (严重破损, 缺少重要部件)