This is an example of how the jpg engine in the GRD II ruins completely any long exposure. This is 8 seconds but it only gets worse from here so RAW is the only option. Don’t think I need to point out which side is RAW and which JPG ;).
First time I took a long exposure I thought the camera misfocused or I chose the wrong focus since it looked completely blurry and washed out. After re-taking it 4 times I just switched camera and realized it’s only the jpgs that look like this.