I got in my Number 5 Optivisor in which is 2.5x at 8" and it seems like I have to get my face too ose to the lathe when I'm trying to pick up threads or doing fine crowning work. I was thinking of sending it back and getting the No. 3 which is 1 3/4d at 14". Less zoom but you don't have to get as close. What do you guys think?