Given the OP says they are using the lens in manual focus mode, I am wondering if the lens is the STM model and because of its fly-by-wire controls, does not feel like a conventional mechanical lens when the focus ring is turned?
cheers, TREVOR
The mark of good photographer is less what they hold in their hand, it's more what they hold in their head;
"All the variety, all the charm, all the beauty of life is made up of light and shadow", Leo Tolstoy;
"Skill in photography is acquired by practice and not by purchase" Percy W. Harris
