Size¹

Focal Ratio²

Casting Date³

Telescope/Observatory

1.8

1.0

6/17/1985

Vatican Advanced Technology Telescope

1.2

1.9

11/11/1987

Smithsonian Astrophysical Observatory

3.5

1.75

4/26/1988

Astrophysical Research Consortium

3.5

1.75

12/9/1988

Wisconsin-Indiana-Yale-NOAO

3.5

1.5

6/28/1989

US Air Force Starfire Optical Range

6.5

1.25

4/3/1992

Multiple Mirror Telescope Conversion

6.5

1.25

2/3/1994

Magellan I, Las Campanas Observatory

8.4

1.14

6/10/1997

Large Binocular Telescope I

6.5

1.25

9/15/1998

Magellan II, Las Campanas Observatory

8.4

1.14

5/20/2000

Large Binocular Telescope II

6.5

1.25

4/4/2002

Lockheed Martin Corporation

8.4

2.14*

7/23/2005

Giant Magellan Telescope I

3.8

3.4

8/28/2006

Test Optic, Mirror Lab

8.4

1.2

3/29/2007

Large Synoptic Survey Telescope

6.5

1.25

8/26/2009

San Pedro Màtir Observatory

1.2

1.9

9/10/2010

Smithsonian Astrophysical Observatory

8.4

2.14*

1/15/2012

Giant Magellan Telescope II

8.4

2.14*

8/25/2013

Giant Magellan Telescope III

8.4

2.14*

11/04/2017

Giant Magellan Telescope V

8.4

¹Meters ²Focal length/diameter ³Casting date *Off-axis segment