Back in New Zealand they realised they could not disappear into the wilderness for weeks at a time so they dreamed up trips to capture the pictures they wanted with young ones in tow.
"We have travelled other countries with fiords, glaciers, geysers, alps and beautiful lakes but these natural features always seem to be separated by huge distances with few points of interest in between.
Not so in Aotearoa, where one interesting landscape usually segues to the next within 100km or so.
"New Zealand's truly unique attribute is just how easy it is for everyday people to experience its outstanding natural features."
New Zealand: A Photographic Journey is a carefully edited selection from the Sissons' catalogue spanning both islands from Cape Reinga to Bluff.
The Sissons live in Alexandra, Central Otago. They say compiling the book provided a poignant reminder of just how beautiful New Zealand is - "something that is easily overlooked after years of travelling and photographing one's home country".
New Zealand: A Photographic Journey, Potton & Burton, $49.99