I usually use the histogram after exposure to make sure I got it right. I usually shoot hand held with a monopod. Today I used a tripod, and mirror lock up, because I wanted slow shutter speed to slightly blur breaking waves. I discovered that with the cable release plugged in, there was no image replay with histogram. It would not play back either. If I made a shot, then unplugged the cable release, the replay with histogram came up, no problem. Is this normal? BTW the cable release is a generic release, not the Pentax brand. Thanks in advance.
Dave G in NJ