Hi Richard,


I wish I could tell you an answer but I had never used the 500 before...I rented it for the trip and I have never used a 600. I did get sharp images with the 500 and my 1.4 TC. I kept the 500 on my tripod/gimbal the entire time, mostly because we were shooting in salt water and while wading there would be no place to set it down plus I didn