Negative Positive
Title: Worth the money
Review: If you like close up macro work then this is a necessity. It works great with my two macro lens, Canon EF-S macro and Sigma 150 macro, have also used it with my Canon 135L and 85 f/1.8 and have been very happy with the results. You do lose the ability to focus to infinity so it is primarily for macro work.
Is the review positive or negative? 