sorry if i am hursh on ur friend.
what happen to the common sense? a camera cost that much because of R&D since it is complicated with many components + other cost.
a dslr lens cost that much because of R&D cost + other cost.
so, looking at the wide-con, how does it compare to the above 2 items?
we r not talking about investment where there r tons of paper to go through, many small prints & tons of legal jargon that commoners like us can understand.
also, why "Urgent" as in the title? your friend already bought the lens. its not as if your friend needed to buy such lens and is asking for opinion before parting with his / her cash.