There doesn't seem to be a Camera Museum currently operating in Hamilton, New Jersey, USA. My search yielded a travel description for a Camera Museum in Hamilton, New Zealand, but nothing conclusive for New Jersey.
However, there is a fascinating sculpture park and museum called Grounds For Sculpture located in Hamilton, New Jersey. While not focused on cameras specifically, it does house a vast collection of contemporary art, which you might find interesting.
Would you like to learn more about Grounds For Sculpture instead?