Butterfly in the Ice

A frosty morning, and there were still patches of ice on the riverside path.  
Having seen a friend's photos on FB, taken with a manual prime and an extension tube, I decided to try the same combination.  Actually I'd forgotten I owned a set of extension tubes.  I hadn't considered however that this would limit me to macro shots for the day.  I dtried swapping out the extension tube, but it was so inconvenient that I kept it attached.