Just got a new lens from India-- an 18" Emil Busch Rapid Aplanat f:8 No. 5. Looks like it was imported by a trading company in Bombay--maybe it was used to photograph the Viceroy. Unfortunately, the iris was removed at some point, but I'm going to use it for portraits, so maybe wide open is ok. Plan B is to cut a slit and make some waterhouse stops, but I'd hate to cut into this lens. Any ideas on the performance and coverage of this thing?