Background: I got back from a 9-day trip to Hawaii last Sunday and I just finished processing all my photos, including several dozen panoramas. The trip was a geology field trip with 11 other people. At the beginning of the trip, I offered to take everyones' photos, compile them along with my own, and make a DVD of the photos to give out to everyone. To make sure that at least some credit is given, all the photos taken by me are prefixed with my last name, and those by others are prefixed with their last name. Situation: All of my photos are such that they're printable easily at 8"x12" for the smallest ones (that's at 288 ppi). Many of the panorama are easily printable at 30" on the longest side, and most much larger. I'm very pleased with many of my photos, and some of them I plan to use in competitions (like this month's TPF one). I will be including a README file on the DVD, and in it I will at least have for my photos a statement saying something to the effect that they are for personal use only, they cannot be edited nor used for any commercial purpose, and any use must have a caption stating that I did the photo. Question: These are grad students and two professors and I pretty much trust them. And I did say I would give out my photos. However, I feel a little uncomfortable providing them with the max. res. files, even though they're the 8-bit JPG versions and not the 16-bit PSDs. I don't want to include a watermark because I think that would make me look more arrogant than I am (since no one else requested that I put a watermark on their photos) and would take away from the photos. Am I making much ado about nothing, or do you think I have a legitimate concern? Should I down-sample the images, maybe only providing them at suitable resolution to print 4x6?