I'm thinking seriously about getting this lens. But I've run into a difference in specs from different vendors.
Amazon says "Lens construction: 5 elements in 5 groups"
Canon store says "Lens Construction: 10 elements in 9 groups"
B&H says nothing.
B&H says Lens diameter: 2.4", Length 2.2"
Canon store says Lens diameter: 2.9", Length 2.2"
Amazon says diameter:2.7", Length 1.7"
Are there different designs of this lens? Where can I find the info about different designs? They all talk as if it is exactly the same lens!
Or should I just forget about it & order the lowest cost & live with what I get?
I'd like to do the smart thing if it's possible.





