sentences:  First shown in Brighton at an international photo conference in 1970, the show was hugely popular, filling theatres, cinemas and convention halls at photo conferences and public performances in over 50 cities around the world.The initial format of the slides was 6cmx6cm, because all Haskins' medium format images at that point had been shot using Hasselblad and Rolleiflex cameras.Haskins took delivery of his first Pentax 6x7 in 1970 in Tokyo but it took several years to build up a body of 6x7 slides.