I have a number of manual lenses. Some focus in one direction and some focus in the other. It would be really nice if they all focused the same way as it would simplify improving my manual focus skills. If I wanted to try and purchase lenses that all matched in their 'direction-ness'... - What is the correct terminology for which way they focus: clockwise/counter-clockwise or left-hand/right-hand, or something else? - Is there any consistency between brands, i.e. Nikons focus left-handed, Canons focus right-handed?