I'm selling a Tamron SP F System 2x Converter for Canon FD breech lock mount on eBay UK, ending on Sunday 30th July. Starting price is £1.99, postage will be £3.90 in the UK, variable for the rest of the world. Untested since I don't currently have any FD lenses, but I will take returns if it gives problems. http://www.ebay.co.uk/itm/132267970116