Occasional bird snapper
To be quite honest Pete, I have always set my on full stops because I can judge the exposure better, I almost always shoot in manual and by using full increments I know the correlation between ISO, aperture and shutter speeds is double or half if you know what I mean.I did that originally as well. But missed the flexibility of increment iso. So went back to using them and I have to say I am seeing no problems with it at all (Im very criticial of my own work and would be the first to complain if I could see any camera related issues on my photos.)
This was at iso2000 which is an increment.
It all stems back from using ISO 400 and f5.6 on my previous lens for so much of the time, I could judge the shutter speed needed for the ambient light and tone of the bird off-pat.When I go out know I can judge that the ambient light (at 18% grey) for ISO 400 and f5.6 is, for example 1/800 sec, so if I am shooting at f8 I know I need 1/400 sec. similarly if I am shooting at ISO 800 at f8 I know I would need 1/800 sec - my little brain could not coup with 1/3 increments ISO's :-O