Her three category-winning shots were among 183 images judged by peers for the Touring Print Exhibition.
The exhibition was the cream of the annual Epson-NZIPP Iris Professional Photography Awards and opened to the public in the Lounge Bar of the Skyline Restaurant last night.
Ms Ranken, who won the Australian Landscape Photographer of the Year award for the third time in May, said she was "thrilled" to win the hat trick with the NZIPP award.
"I really enjoy printing. I find it pushes my work to the next level," she said.
Asked what he thought of the prints on display, Mr Langford said the images were "pretty exciting because of the diversity and originality, especially when you get into more commercial sectors, they're really pushing boundaries".
The exhibition was expected to be in the lounge for a month.