Zeiss luminar special objectives photomacrography . Available to purchase for immediate download. Below is an extract from the manual converted to text for a quick impression on the content. Zeiss luminar special objectives photomacrographyCARL zenss zmss mm West Germany ZEISS LUMINAR Objectives Special systems for photomacrography “Mikro” Bulletin No. 3 General LUMINAR objectives are special photographic systems for those cases where the image distance (distance between objective - film) is larger than the object distance (distance between objective object). Depending on the requirements, 3 to 5 lenses are used to achieve maximum imaging quality. High numerical apertures (these correspond to the f-number of normal photo lenses) offer maximum resolving power. Coupling this with the precision applied in manufacturing microscope objectives we have deveIOped tOp-flight products that are unsurpassed. LUMINAR objectives are supplied with the focal lengths of 16 mm, 25 mm, 40 mm and 63 mm, have an iris diaphragm with engraved exposure factors and the international microscope standard thread W 0.8" x 1/36". Camera adapters: All well-known producers of prefessional view cameras supply LUMINAR adapters and some of them even have the objectives in their delivery programme.To be able to use LUMINAR objectives with the bellows units of various 35 mm reflex cameras, the LUMlNAR thread/T 2 thread ring (Zeiss Cat.No. 42 25 04) together with the T2 adapters marketed by specialist dealers is required; T2 adapters are available for almost all makes on the international market.