Canon Lens HJ21x7 5B-III KLL-SC

Canon Lens with adapter for Lumix Cameras.
The zoom is a little stiff from 40 till 158.
Aperture is perfect, but focussing is a little stiff too.
There is a crack in the lens and metal case. Please see pictures for more details.
I used Panasonic AF100 with the lens and picture looks very good to me