Lenses, Shutters, and Literature

1–10) Brass lenses with screw-on rings, ideal for supplementing cameras 9 x 12 cm to 18 x 24 cm; includes 2 landscape lenses; all in average to good condition with complete glass elements. (3/3) – 11) O. Toepfer's shutter, 8 x 17 cm, front and back designed for 53.9 mm bayonet mount; sluggish response when cocking; speed settings 1–10 non-functional. Shutter aperture 52 mm. From the early era of shutter design. – 12) Wooden drop shutter, 19 x 8.5 cm, clamp-on mount (up to 45 mm). – 13) Ilex Shutter Patent, brass, 82 x 61 mm; speeds 1/100 to 1 sec., functional. Mounting diameter 38 mm. (3+/2-) – 14) Obturateur Système Ch. B. "Le Constant", no. B5217; functional; nickel finish, 93 x 61 mm; clamp-on mount (up to 45 mm). (3/3) – And: 15–21) Specialized literature on lenses: D’Agostini 2011 – Berthiot Chevalier..., 371 pages; Beck 1903 – Photographic Lenses, 320 pages; Brandt 1956 – Das Photo-Objektiv, 246 pages; Naumann 1940 – Das Auge meiner Kamera, 136 pages; 1911 Catalog – Optisches Werk Staeble, 112 pages; Thiele 2001 – 150 Jahre Photooptik in Deutschland, 122 pages.; 1907 Catalog (copy) – Voigtl?nder, 136 pages.

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)