UC Library is currently working on a project to digitise early modern books. We don’t know exactly what our end product will look like but we do know that we need really high quality images that will allow us to be flexible and innovative. During this project we’ve encountered a dilemma about image capture format choices. It seems the traditional advice to always capture to tiff is being replaced by a move toward capture to raw image formats, in particular .dng. We’ve encountered a choice between a high quality scanner that can only capture to tiff or a perhaps lesser quality camera option that can capture to .dng. We don’t really understand the opportunities and additional functionality that might be offered by the .dng format and would like to explore this further.