Palomar observatory, USA (1989)
Lisbon observatory, Portugal (2002)
Lisbon observatory (2003)
380mm refractor
380mm refractor
380mm refractor
transit instruments
zenithal refractor
Science Museum, Lisbon, Portugal, 150 Zeiss refractor
bifilar micrometer
La Silla observatory, Chile (2001)
La Silla Observatory (2001)
La Silla observatory (2001)
Cerro Tololo observatory, Chile (2003)
Cerro Tololo observatory (2003)
Cerro Tololo observatory (2003)
Cerro Tololo observatory (2003)
Cerro Tololo observatory (2005)
Cerro Tololo observatory (2005)
Cerro Tololo observatory (2005)
Cerro Pachon observatory, Chile (2003)
Cerro Pachon observatory (2003)
Cerro Pachon observatory (2003)
Cerro Pachon observatory (2003)
National observatory, 460mm refractor, Rio de Janeiro, Brasil (2005)
National observatory, 210mm refractor (2003)
National observatory, 210mm refractor (2003)
National observatory (2005)
National observatory (2005)
National observatory (2005)
National observatory (2005)
Valongo observatory, Rio de Janeiro, Brasil (2005)
Valongo observatory (2005)
Valongo observatory (2005)
Valongo observatory (2005)
Valongo observatory (2005) The World's Largest Optical Telescopes
