I was wondering if anyone knew of any inexpensive third party macro adapters that that would work with any of my lenses (50mm f/1.4, 17-40, 70-200mm f/4L). I was looking into a macro lens for canon but the price was around $200 used for the cheapest one. I am not that big of a macro photographer, but I take pictures of things from day to day and some of the things I want to photograph are very small (found a tick on my dog once that I wanted to take a shot of). So before I go investing in a used macro canon lens, are there any adapter alternatives? For me "cheap" means less than $150.