The Canon Prima Twin (or New Sureshot in America or Autoboy WT28 in Japan) is a 1990 bifocal compact autofocus camera. A slider on the front retracts the lens barrier and the lens comes out in its 28 mm mode. A press of a button makes the lens extend to its 48 mm "tele" mode. A date back is standard, and as the Japanese model name World Traveller 28 indicates, it can set the date of 24 cities around the world, including daylight savings time. It also has an alarm, to help the traveller wake up in time for his next flight.
Wide: 28mm f/4 (4 elements in 3 groups).
Tele: 48mm f/5.6 (7 elements in 6 groups).
AF System: Triangulation system with near-infrared beam. Prefocus enabled.
Metering range: EV 9.5 (f/4 at 1/45) – EV 17 (f/22 at 1/250) (wide); EV 11 (f/6.5 at 1/45) - EV 17 (f/27 at 1/180)
Viewfinder: Variable-magnification albada viewfinder. 0.34x - 0.58x magnification and 84% coverage.
Film speeds: ISO 50 – 1600 (with DX code).
Flash: Guide no. 9.
Calendar: Auto calendar programmed for 1989 to 2022. Digital panel displays the date and time (including daylight savings time) for 24 cities around the world. Alarm provided.
Power source: 6 V 2CR5 lithium battery.
Dimensions & weight: 142 x 77 x 60 mm, 360 g (with battery).