Has anyone got or links to a chart with EF mount minimum focus distances? re my post in photos "eye like macro" i have been stacking tubes and converters on a 100-400 sigma. i'm guessing its natural long minimum focus distance has helped out in getting so close, i'm just guessing and going by experimentation. what i think i want next would be a prime with long minimum focus distance so i can tube it up for 1:5 and greater i'm also wondering if i should be looking to stick to a zoom so i can pull back if things get too close.