Iris control on Camera

Hi,
Sorry for my english !
I can't move the " diaph" like iris control for light with the camera.
It s work with a 28mm, 28-200 but not on the canon 10-22, and for aerial view i must take a 10mm.
Thank you
Sorry for my english !
I can't move the " diaph" like iris control for light with the camera.
It s work with a 28mm, 28-200 but not on the canon 10-22, and for aerial view i must take a 10mm.
Thank you