the safest choice is one of the Sigma converters. Herb.... ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, March 26, 2004 11:45 PM Subject: Re: tele extenders
> I am considering a tele-extender for my Sigma 7-300 Zoom. At 70 mm, the > back element is back into the mount, and moves forward as I zoom to 300 > mm. What options do I have and can I preserve the AF?
