So finally I got my hands on a bower 14mm, in preparation to a Canon ef 14mmL II loaner trial.
Sure I was aware that focus and aperture are manual, BUT as I switched the aperture ring back and forth,from 2.8 to 22, no light change did happen.
I tried a few times, and nothing, till I gave the lens a light tap on the side, when the value was at f/22.
The viewfinder did become darker as it should be. I turn the ring to 2.8, and it did become lighter, but as I turn it back to 22, again no light change on the viewfinder
The light tap solved the problem.
No, I am not kidding, but has annyone ever experienced similar situation with this lens ( knock-offs included)?
It seems that the lens has some issues...
Thanks for your feedback