Canon Camera Lense 11-22mm f/4-5.6 IS STM EF-M 11/22mm f/4-5.6

I am not having luck with the comparisons with you, almost a month ago I bought a lens that is not a real 12mm because the circle closes when you go down from 18mm to 12mm, I buy another one and it is not for a canon Eos 5D Mark IV, I think it was not very well specified, sorry, I will see if I find one that suits me and if not I will have to go to another site with pain, because I need a lens to take real estate photos! Cheers! Bernat