SYDNEY — Canadian investment group Onex Corp., which owns U.S. exhib Loews Cineplex, has entered the exhib market in Germany by buying 50% of 181 screens formerly owned by the bankrupt Ufa Theater.Onex has formed a co-venture in Germany with Kieft & Kieft, which operates the Cinestar multiplex circuit. Co-venture bought the vast majority of Ufa’s screens from the receivers for a bargain price of less than $5.2 million. Onex’s role was confirmed Monday by David Seargeant, managing director of Australia’s Amalgamated Holdings, which owns 50% of Kieft & Kieft. Deal does not give Onex equity in the 400 Cinestar screens operated by Kieft & Kieft. Ufa sites will be re-branded as Cinestar, making it the largest exhib in Germany.