It wasn't a portrait but a landscape image so it doesn't fully apply to your situation, but I had my 2:3 shots printed to a 16x20. It leaves a blank space about an inch and a half on top and bottom. I filled the blank space with black to go along with my black frames so it looks just fine.


A lot of times I see photos being presented with an inch or two of white foam board (I don't remember the proper terminology [*-)])around the image before the actual frame begins. I bet you could still print your 2:3 photos with the blank fills on the top and bottom as a 8x10, but just cover it up with the foam board to make it 2:3? There might be uneven spacings between the sides and top/bottom, but I think it may be better than cutting a person in half []


Or, just keep the blank fills white, so it'll somewhat blend in with the white foam board.


I love the 2:3 ratio of the camera, and it's a shame that they don't print large sizes in that ratio.