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A refractor with a focal length of120 inches being used by Henry Lawson
ARP23A16_215

A refractor with a focal length of120 inches being...

A bellows camera
ARP23A15_472

A bellows camera

A bellows camera
ARP23A15_471

A bellows camera

Painted Stela
ARP17A34_150

Painted Stela

Observers using a refracting telescope
ARP07113_010554P

Observers using a refracting telescope

Long focal length refracting telescope
ARP07104_460001263

Long focal length refracting telescope

Reflecting telescope of 40 ft
ARP07104_460001282

Reflecting telescope of 40 ft

William Herschel, Télescope
ARP07096_390001535

William Herschel, Télescope