To provide easy on-line availability, with reasonable file sizes, our hi-res images are provided as high quality jpegs, most utilising sRGB or AdobeRGB colour profiles. Some of our images are also available as TIFF files (typically 35MB each), and some are available with alternative colour profiles such as PROPhoto. If the on-line jpg file does not provide the print quality you need, then please ask whether an alternative version is available.