The largest solar telescope is the McMath-Pierce solar telescope which opened in 1962 atop Kitt Peak in Arizona, USA. Light from the sun is collected via a 152 m long (498 ft) slanted shaft,, which directs sunlight on to a 1.6 m (5 ft 3 in) mirror, 50 m (164 ft) below ground. It forms an 85 cm (33 in) wide high-resolution image of the sun.