The Eastar was produced by the Tianjin Camera Factory in about 1977, and is a 6x6 TLR sharing the same basic design as the Seagull 4B. It uses knob film advance with a red window for frame counting, with an option to mask the film gate to 6x4.5 cm (to yield 16 exposures per roll of 120 film). It has a coated 75mm lens which offers an aperture range between f/3.5 and f/16, and shutter speeds from 1 to 1/300 sec. It also has a self-timer and a PC flash synch.