"Gary Fisher" <[EMAIL PROTECTED]> wrote/replied to: > >I would think that should be ok. Both the Canon and the Sigma extenders have >protruding front elements.
Wow, I didn't know that. Is this a special Sigma extender to go with their pro lenses or something. I can't believe all Sigma extenders would not fit anything but a Sigma Pro lens or a Canon L lens. Interesting that Kenko actually makes a 3X extender in their new lineup or Pro extenders. I want to get a 3rd party 1.4 or 1.5 extender. But I want it to work with AF on my 100-400L IS. Does anyone know if the new Pro Kenko extenders will do this, or do they report the proper aperture? I don't mind to get an older Kenko as they are quite excellent, but I would like the best possible for the situation. The Canon is out obviously, cause it won't AF at all. What about a Sigma? Jim Davis Nature Photography http://www.kjsl.com/~jbdavis/ * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
