On Tue, 20 Nov 2001 08:35:18 -0500, Mark Roberts wrote: >I just discovered that my Sigma EX APO teleconverter (the 2x one) won't >work with my SMC-FA*80-200/2.8 (either the elements of the teleconverter >extend too far forward or the elements of the lens extend too far back; >I'm going to let them argue amongst themselves as to which is actually the >case). > >The Pentax 1.7x AF converter works fine. Can anyone recommend a good 1.4x >TC? >I'd like to try the Sigma EX APO 1.4x since the 2x is so good, but I'm hesitant >to buy it given the problem with the 2x and this lens. I have the 2x mainly >for use with my 300mm prime but I'd definitely want a 1.4x to be usable >with the 80-200 zoom.
Hi Mark, I have 3 Sigma converters, the 1.4x and 2x APO and a 'normal' 1.4x The 1.4x will probably have the same problem, it is only slightly better in this aspect! I just measured the clearing between the K-mount flange and TC front-lens for all: STD 1.4x 8.5 mm APO 1.4x 1.9 mm APO 2x 1.4 mm So while the 2x APO is worst, the 1.4x is not far behind. The STD 1.4x would not be a problem, but lacks optical quality compared to the others. Regards, Jan van Wijk --------------------------------------------------------- Jan van Wijk; www.fsys.demon.nl - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
