In article <01bc4848$b86fa160$636793cf@mary>, nealfindley@worldnet.att.net says...

>Is anyone using a 2X converter with this lens and if so which one? How are
>the results?

The TC300/301 is a really excellent match for this lens - useable wide-open,
really good two stops down (unusually good performance for 2X converters...).
Hope This Helps (or, David Ruether, madly working on a web page...;-)