Yeah, see your lemon-dog (lens) really got a good bite at it!
I, we, got this lens for our wedding (somewhere in pre-historic times) from my canon-devoted father-in-law. Others get pepper&salt, we got lemon/dog. The first time I could love this lens was on my now "pinched" (by my second son) K20D. At f9 it performs stunningly. Somehow it just won't do well for me at 2.8 -4. But it is light and comfortable, has smc A colours, well, this has nothing to do with your lovely picture. Lovely it is.
Strange enough I met with a flos cuculi in full bloom only last week. I thought it had fallen out of time. So beautiful. Well, sorry for this erratic post.