I note that you produced HDR images (presumably using Photomatix software?) of each set of photos before merging them into a panorama. The question I have is did you use the default Photomatix seetings for the HDR conversion and then save the resulting image as a TIFF or a JPEG file? Presumably you applied no further adjustments to the HDR images in Photoshop before creating the panorama? What Photoshop adjustments were made to the panorama after it was created? How long did it take to stitch it together? I have tried assembling an HDR panorama myself but took a different approach. I first stiched the the sets of three exposures together into thre panoramas and then tied to merge them to HDR. Not surprisingly this method failed as each panorama had a slightly different number of pixels. I plan to try your method in London this weekend. Are there any other tips which you could offer? RAL