Sharper non Canon lenses to go Canon T2i
I am not a techie on matters of lenses so when I look at specs of lenses, I hav eno idea which can be used with my DSLR.
I currently use a T2i, and have a Rokinon 8mm which is the only non-canon lens I own . I would like to add several non canon, sharper lenses. Although I have a 50mm, I would love to add a 40mm, a 12-20, and probably a 100mm. As sharp as my pocket will let me, or maybe not, just middle of the way expensive. Sharper than f4.
What do you suggest?