The ship offers many other photographic services.  They'll take your 8x10 portrait and put it on canvas ($64.95 to $160, print your digital pictures (.75 to $5.00),  sell you film of all kinds (hotel gift shop style pricing) and develop it right there too, even rent you binoculars for the week ($30).  All the prices are clearly displayed and the people are really helpful.  There are many packages available too like the Deluxe package for $4.95 ( a great value ) that gives you 2 -5x7 photos and 4 wallet size when you buy an 8x10.  This department really has it all together, they deserve your business.

Well two tips in one actually. 

Carnival sells "photo coupons" in advance of sailing through the Bon Voyage department online (see "Fun Stuff") You can get, for example, 3- 5x7 photos for $15.00, a nice savings

Buy as many as you think you really need here, on land, away from the intoxicating wonder of being on the cruise.

Then that's it!

You will choose your photos from all the ones offered more carefully.

Also- wait till the end of the cruise to buy- those photos will be there all week. If you see some that are just awful throw them away in the "reject" boxes they have around there so the photo staff doesn't have to keep moving them from place to place as the cruise progresses.

Also- I DID get in trouble with DW for buying pics of a good looking family to pass off as us. She was not amused

After you take your get home, you'll want to share your photos with friends and relatives.  There's no better way than sending them out over the internet.  There are several sites that allow you to post your photos for all to see and give you an address to send to those you'd like to send directly to your gallery.  Webshots is probably the most popular.