what do you consider super expensive? I bought the speedbooster XL and have no regrets. It is however $600+, not sure if you consider that expensive? Build quality is out standing though.
Was going to the get Aputure Lens regain until I found out it doesn't give you in camera focus or aperture adjustment. If lens regain added in camera connection, they'll run metabones out of business since the lens regain comes with a controller to remote pull focus. Not sure why they didn't add the camera connection...
