Thanks again to all who have commented, including Bjørn.
Bjørn - I'm not familiar with "Black List status" - the phrase indicates disapproval? It is certainly an invasive species. Incidentally, the image you cite was shot with the 70-200 f4. I have sold my formerly favourite 60mm f2.8 G because I prefer the look I get with the zoom, and with front and/or rear attachments, I can get in close enough for my needs. I really do like this lens.
