FYI - I just noticed that the normally scarce Canon Lens hood for their MPE-65 macro lens is available at bhphotovideo.com. The URL is below:
http://www.bhphotovideo.com/c/product/2 ... _Hood.html
I haven't tried this item and thus have no idea how effective it is, etc. I haven't looked for the lens hood at other vendors and don't know what its manufacturing status is, how long it may stay in stock, etc.
These items have been almost impossible to find in the past few years.
A forum to ask questions, post setups, and generally discuss anything having to do with photomacrography and photomicroscopy.