If you are shooting colour positive film (transparencies/slides) and scanning it yourself, then for maximum accuracy in colour reproduction, it is advisable that you calibrate your film scanner using a standard "IT-8" target (this can be done from within many scanning software packages, e.g., VueScan).
These targets are generally available as 35mm, 6x7cm and 4x5" Fujichrome and Ektachrome transparencies (slides).
