UA Science

You are here

Large Binocular Telescope

The Large Binocular Telescope (LBT) is located on Mt. Graham in south eastern Arizona, and is part of the Mount Graham International Observatory. It is unique both in having the largest total collecting area of any Optical/IR telescope and, more importantly, provides the largest optical baseline, which enables the highest resolution IR imaging through the technique of interferometry. With its 22.5m baseline, It is the first of the next generation of large ground based telescope that are expected to have baselines of 20m or greater. The LBT is a private telescope operated by an international consortium of universities from Germany, Italy and the United States - including the University of Arizona.

For those interested in proposing for observing time go here.


LBT Specifications

Location Specifications






10567 ft.

Telescope Specifications


Two 8.4 m mirrors

Focal Length  

9.6 m



Additional Information on telescope specifications

LBC Large Binocular Cameras
LBTI Large Binocular Telescope Interferometer
LINC-Nirvana LBT Interferometric Camera/Near-IR & Visible Adaptive Interferometer for Astronomy
LUCI LBT Utility Camera (& Spectrograph) Imaging fields for Extragalactic Research
MODS Optical Spectrograph


Potsdam Echelle Polarimetric & Spectroscopic Instrument

Additional instrumentation & Science Operations


The weather forecast at the LBT is provided by the National Weather Service.

For the public
For Public

Public events include our Monday Night Lecture Series, world-reknowned Astronomy Camp and Mt Lemmon Sky Center.

For Students

A good place to start if you want to become an undergrad major or grad student, or need to find our schedule of classes.


For Scientists
For Scientists

Find telescopes and instruments, telescope time applications, staff and mountain contacts, and faculty and staff scientific interests.