for aperture/shutter speed, I use 1/3rd stops. But I have ISO set to full stops as I seem to think that they are the only 'real' stops, with inbetween ones being basically the nearest lower ISO bumped up by software.
Is this right? Ideally I suppose it would make sense to use 1/3 ISO settings so I can twiddle the wheel the same amount to compensate when fiddling.
What are your ISO settings, and is there any real reason to use one over the other?