British Astronomical Association
Supporting amateur astronomers since 1890

Secondary menu

Main menu

BAA Community Member Pages Alex Pratt
Image search

Turner and Lee three-colour projector

Image

Expand image

About this observation
Observer
Alex Pratt
Time of observation
03/05/2017 - 11:00
Object
Turner and Lee three-colour projector
Observing location
Science and Media Museum, Bradford
Equipment
Canon EOS 500D
24mm f/2.8
Like This Image
Share

Three-colour composites are not the exclusive preserve of 21st century astrophotographers.

As a practical application of James Clerk Maxwell's work on R, G, B primary colours, in 1899 Edward Turner (financed by F Marshall Lee) constructed a cine camera that recorded a sequence of frames onto monochrome film taken through red, green and blue filters. After the film had been developed it was loaded into the accompanying projector which used an ingenious mechanical system to project each triplet of frames through the corresponding red, green and blue filters, resulting in a 'true colour' cine film being shown on the screen at a rate of 16 fps.

The three-colour projector can be seen at the National Science and Media Museum, Bradford

Copyright of all images and other observations submitted to the BAA remains with the owner of the work. Reproduction of the work by third-parties is expressly forbidden without the consent of the copyright holder. For more information, please contact the webmaster.