Color correction: As we work in Lightroom, the expected input is the LR catalogue and the Smart Previews. The output file format will be LR catalogue. If you do not use Lightroom, you have the option of sending us RAWs. The output in such cases is XMP or JPEGs (at an additional cost).
Retouching: The preferred input format is a RAW file because it simply contains more information. The images will be delivered as TIFF, JPEG or PSDs with or without layers (upon request).