the L teleconverters work on a very limited number of lenses. the 2X-L protrudes almost an inch in front of the mount and the 1.4X-L a little more. my tests on the Sigma AF converts show them to be very good.

Herb...
----- Original Message ----- From: "Bruce Dayton" <[EMAIL PROTECTED]>
To: "jtainter" <pentax-discuss@pdml.net>
Sent: Tuesday, February 08, 2005 2:14 PM
Subject: Re: teleconverters



Sorry, I didn't realize that you were talking about the newer "Pro"
versions.  My understanding is that only the Sigmas are available in
Pentax mount and the Sigmas only fit certain lenses.

If you don't need AF in the converter, KEH has a couple of 2X-L's for
about $160.




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