Very early / 1886 / brass lens - group antiplanet by STEINHEIL .

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. THE GROUP ANTIPLANET no 17535 THIS LENS DATES TO circa 1886 , STEINHEIL , MUNCHEN . F- circa 280 mm Cover see above ...my lens is no 5 . High - 56 mm , diameter connect ring - 80mm . Very nice condition , without haze , mould , cob , a few thin micro scratches ...between cemented glases some micro point like bubles of air ... The Group Antiplanet was originally patented in 1881. It has two non-symmetrical pairs and is rectilinear. As can be seen in the reference, the asymetrical design featured a relatively thick cemented rear doublet. This was done in the belief that certain aberrations would be reduced, but in actuality, coma increased. Steinheil believed the Group Antiplanet to be good for just about anything a photographer would ever want to do: Portraits, Groups, Architecture, Landscape, Instantaneous Work and Enlargements. Prototype with built in diaphragm with 14 blades . With the connect ring . The shipping cost in EU is 12 USD , North ans South AM ,AFR - 14.5 USD , ASIA - 18,5 USD , AUSTRALIA 20 USD