ELCAN Optical Technologies

Raytheon ELCAN Optical Technologies, also simply ELCAN (Ernest Leitz CANada), is a Canadian optics and electronics manufacturing company owned by American defense contractor Raytheon, currently based in Midland, Ontario. ELCAN produces optical devices geared towards both civilian and military markets, and their products are sold through Armament Technology Inc. based in Halifax, Nova Scotia and associated channel of dealers.
Products.
ELCAN is perhaps best known for making the 3.4×28 power ELCAN C79 optical sight that is widely used on the Diemaco C7, FN MINIMI, FN MAG and CZ-805 BREN families of firearms. The C79 sight is not designed as a sniper sight per se, but is rather intended to be mounted on a variety of rifles and to be used by regular infantrymen as well as designated marksmen.
The M145 machine gun optic differs from the C79's standard 3.4× sight in that ballistic compensation is provided for in the reticle, rather than in the mount. Reticle illumination is by a battery-powered LED with eleven intensity settings. It is used by the US military for its M249s and M240s.
ELCAN manufactures the Specter line of combat optics. They come in a variety of configurations. 
Specter DR 1.5×/6×, DR 1x/4×, 4× Optical Sight and TR 1/3/9 are available with a 5.56×45mm NATO or 7.62×51mm NATO ballistically matched reticle.