I think I (my plants) have a case of Alternaria
http://aggie-horticulture.tamu.edu/publications/tomatoproblemsolver/leaf/alter_cank.html
But my spots are more rounded. So it may be Grey Leaf spot. I'm not
sure. New growth looks good, but the old (2weeks) is affected.
Anyway, what is a good fungicide? I'm trying the Copper based Ortho
fungicide for starters.
I'm in Zone 6, and its been cool & rainy lately.

Any other recommendations?

Cheers