I put a Vivitar tele converter on my 70-300 lens. It went on easy but wont come off. How do I get the thing to come off my lens? I have a Nikon D3000 camera.
I'm struggling to figure out whether there's a teleconverter (available in the UK now) that will go between a Sony Alpha A77 and a Tamron lens. There seems to be some recommendations I could find, but ...