Iris photometer, Edinburgh Observatory

Iris photometer, Edinburgh Observatory

R102/0242 Rights Managed

Request low-res file

530 pixels on longest edge, unwatermarked

Request/Download high-res file

Uncompressed file size: 50.2MB

Downloadable file size: 1.7MB

Price image Pricing

Please login to use the price calculator


Credit: ROYAL ASTRONOMICAL SOCIETY/SCIENCE PHOTO LIBRARY

Caption: Iris photometer. This instrument is used to measure the relative brightness of stars. An adjustable aperture (the iris) is adjusted around the star being measured until the light matches a reference value. This is seen on the screen at left. This is a digitised iris photometer, with the digital readings displayed on the machine at centre. Digital astronomical equipment was developed in the mid-20th century. This photometer is located at the Royal Observatory, Edinburgh, Scotland.

Release details: Model release not required. Property release not required.

Keywords: 1900s, 20th century, astronomical, astronomy, astrophysics, black-and-white, britain, british, digital, edinburgh, equipment, europe, european, historical, history, history of science, indoors, inside, instrument, iris photometer, lab, laboratory, measurement, measuring apparatus, monochrome, observatory, photometer, research, roe, royal observatory edinburgh, scotland, scottish, star, stars, stellar, technological, technology, telescope, uk, united kingdom

Licence fees: A licence fee will be charged for any media (low or high resolution) used in your project.