I had a problem using the sp-350 with the pt-030 housing while snorkeling. When the sun was very bright, it was not possible to see anything in the viewfinder. I tried to change the brightness of the screen but to no avail. I had to guess that the object was being photographed. When the clouds were out, I was able to use the viewfinder. I had the same problem using the camera with the pt-030 while above water when taking pictures in sunny conditions. Has anyone else experience the same? Any suggestions?