The aperture adjusts optical honored my 40 150s. However, the assembly is something special. Usually, a sun visor is easy to bayonet to push and then locked by rotation a. Here is only a limited way. The aperture can be pretty stiff push the lens and then sit quite tight on the bayonet. You can then a little further until it stops and does this worry about his lens. At first I thought I would get delivered the wrong stop. Unfortunately, I lack the respect to the original.
