Martin Elliott's Tennis Girl – which sold more than two million copies worldwide – was taken in 1976 and featured his then girlfriend, Fiona Butler, 18.
Mr Elliot, 63, died peacefully at his home in Cornwall after a ten-year battle with cancer. Widow Noelle, who met him in 1987, said:
"Martin sold the image to Athena – who turned it into a poster – but he retained the copyright. I am still getting royalties to this day. They're only a few pence, but because it has sold all over the world, we have done well out of it."