Hi I have a canon efs 18-200 lens. I am trying to find a 2 x converter that can be used with this lens and will work. My camera is a canon 700d. Any help I will be truly grateful James.
Camera is not the issue EF-S lens would be, there are EF lenses as well which do not work with extenders because they protrude into the extender. I am not aware of any converter that works with EFs, sure you can use extension tubes but that wont get the multiplication your asking about. and if you are birding you want zoom and decent autofocus, so I would suggest put the money towards something like maybe a 150-600 ef mount.
