The Maxxum 7D does not see that lens as a 1.8, Minolta never made AF 1.8 lenses so the camera thinks its a 1.7, its just a software thing, otherwise that lens is perfectly compatible with the Maxxum 7D and all Minolta "A" mount cameras film or digital. I'm Glad you like the Shot!!

Great shot although I'm a little confused by your lens settings.