By all means, go to Cobh (pronounced "Cove"), which is right next to Cork. I would also suggest that you rent a car and just go driving up the west coast. You're not that far from "Ring around Kerry" and the Dingle Peninsula, you can go from Galway up the coast through Connemara and just basically hug the coast, stopping whenever you want to photograph the gazillions of gorgeous views and interesting things you will see. There are great cemeteries, monastery and church ruins, cute little towns, farm views, the Burren and neolithinc ruins, and from Galway you can even take the ferry out to the Aran Islands and have a great day or two of hiking and shooting. Two weeks in Cork? I cannot think of a much better way to spend two weeks out of your life!
Have a great trip and enjoy Ireland -- it's a wonderful place!