Filzkoeter
stray animal
You can always buy a J8 in addition... for that Sonnar look 
hey, they're cheap!
hey, they're cheap!
malkmata
Well-known
I have both lenses, tend to you use the Canon a lot more. My J-8 has the tab but the focusing ring was a little stiff. Yuri from Fedka recently re-lubed it for me. I plan to use it more. I use both lenses on my Ms, Barnacks and Canon P.
J-8 samples:
http://www.flickr.com/photos/malikmata/tags/jupiter8/
Canon 50/1.8 samples
http://www.flickr.com/photos/malikmata/tags/canon5018ltmlens/
J-8 samples:
http://www.flickr.com/photos/malikmata/tags/jupiter8/
Canon 50/1.8 samples
http://www.flickr.com/photos/malikmata/tags/canon5018ltmlens/