Pantoscop No. 5, post-1872

R.O.J.A., formerly Emil Busch, Rathenow, Germany. Impressive brass lens with strongly curved menisci, 1:22/25 cm, designed for plug-in apertures, image circle of approx. 50 cm. Glass under point light well preserved, no cementing defects, a small dent in the backing (without affecting image quality), lens height 5 cm, diameter 7 cm. From the initial advertisement of February 1866: "… the new lens for landscapes, architecture, and interiors, called PANTOSCOP, constructed by E. Busch, which covers a 95-degree field of view in a 2 x 3 rectangle, renders near and distant objects with equal sharpness to the very edge without distortion, and is supplied in six different sizes." Just one month later, photogrammetry began to take an interest in this lens, which would become an indispensable part of the Prussian Monument Archive for decades. – An important historical collection piece in good condition!

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)