Largest lens

According to Official Guinness Records,

The largest refracting optical lens in the world measures 1.827m (5.99ft) in diameter. It was constructed by a team led by Thomas Peck (USA), at the Optics Shop of the Optical Sciences Center of the University of Arizona in Tucson, Arizona, USA, and completed in January 2000. It was built as a test for the secondary mirror of the 6.5m (21.3ft) MMT Telescope on Mt Hopkins, Arizona, USA. The lens is made from fused quartz and weighs roughly 1000lb (450kg)

For a complete list of 2003 records, please visit 2003 Guinness Records in United States.

Related Images

Other United States records that might interest you:

• Most expensive horse draught horse
• First telephone call
• Heaviest hoverable fighter plane
• Longest laser ranging experiment
• Longest non-stop ocean voyage by a raft
• Largest vacuum chamber
• Largest trick roping loop by a female
• Largest kugel
• Largest tuning fork
• Longest marathon playing a trading card game