Detail of a fresnel lens designed by David Stevenson for Inchkeith Lighthouse at the end of the 19th century and now part of the National Museum of Scotland on Chambers Street in Edinburgh. This first order dioptric holophotal revolving light showed a flash every half minute and made one complete revolution in four minutes.

Fresnel lens detail

Edinburgh, ScotlandDave Fitch

Detail of a fresnel lens designed by David Stevenson for Inchkeith Lighthouse at the end of the 19th century and now part of the National Museum of Scotland on Chambers Street in Edinburgh. This first order dioptric holophotal revolving light showed a flash every half minute and made one complete revolution in four minutes.

1 Photography article

Polarisers and sunshine don’t always go together

Your lens came with a hood for a reason. Use it.

Photography article: 'Polarisers and sunshine don’t always go together'

The most popular photography categories on iso200.com: