Some of the early astronomical photographs were taken in England by astronomers using Thomas Cooke & Sons telescopes.
At this period of time telescopes were designed for visual use and all the gentlemen astronomers had the problem using refractors of the difference between the actinic and visual foci. Reflecting telescopes did not suffer from such problems.
The negatives obtained by both Phillips and Fry were about 1
inch in diameter.
www.theramblingastronomer.co.uk

No comments:
Post a Comment