The Seagull GC-105 is the second of three cameras in the Seagull medium format roster. Like the GC-104, this non-metered classically-styled twin-lens reflex camera is patterned in the time-honored design of older Yashicamats. Its lightweight simple design consists of a waist-level finder with pop-up magnifier, manual film crank advance and separate shutter speed and aperture levers. The GC-105 includes the same built-in (non-interchangeable) 75mm f/3.5 Seagull lens but also includes a brighter f/2.8 viewing lens that helps make focusing easier. The GC-105 also has a split-image focusing screen (not included in the GC-104).
Please note that the GC-105 is only for the 6 x 6cm format and does not contain the additional 6 x 4.5cm format mask included with the GC-104. A major difference between the cameras is the self-cocking shutter of the GC-105 that is activated by advancing the film (The GC-104 requires separate film advance and shutter cocking). The mechanical lens shutter design provides flash synchronization at all speeds up to 1/300 second and there is also Bulb exposure. This camera also features a cold flash shoe and PC terminal for external electronic flash connection.