Most helpful critical review
21 of 22 people found the following review helpful
Can't Live Without It/Forced to Buy It
on December 21, 2009
Unfortunately, a side-effect of upgrading from the EF 100mm f2.8 Macro to the new EF 100mm f2.8L IS USM Macro is having to buy this adapter. Pretty steep for a small ring, but it's a Canon item, what can I say. Build is decent, almost feels aluminum rather than plastic. Threads work smoothly on lens. Make sure it's tight or the ring portion of the flash will rotate.
The ring works as expected, and so far hasn't caused any vignetting when used with MR-14EX. It's a minor pain if you use the ringlite flash a lot since you have to remove it again to put the lens cap on. I ended up just keeping in the pouch with the flash.