Thanks for the replies. It’s a worthwhile feature being able to quickly have access to 2/3rd shutter speed adjustments. But my issue is the camera does not go to higher or lower speeds from that point. Using my example of 1/500 I can go the 1/3 … 2/3 stops up and down. What I/the camera cannot do is go higher or lower than the 2/3rd’s. Using the 1/500th example on my previous post, I can not set the shutter to 1/250th or any other lower setting and/or higher setting eg. 1/1000th. I cannot go outside of the limited 1/320 1/400 1/500 1/640 1/800 range. Up or down.