On 10 November 2010 23:10, Bob Sullivan <[email protected]> wrote: > Subash, > I can't get it to autofocus with the A400/5.6, > but the A200 f4 and A300 f4 work fine for me. > I think this is an autofocus with the 1.7 and A300. > http://picasaweb.google.com/rf.sullivan/PDML2009#5436368437062520114 > Regards, Bob S.
I've managed to get my 1.7x TC to focus with a Tokina 400mm f/5.6 and a Sigma CAT 400mm f/5.6, but it does need good light. I've had no issues whatsoever with a 200mm f/4. For shits and giggles I once mounted the TC on a Sigma CAT 600mm f/8 and did get it to AF; it was very sunny and I chose contrasty subjects, but I was still impressed. All this on my K10D, by the way. --M. -- \/\/o/\/\ --> http://WorldOfMiserere.com http://EnticingTheLight.com A Quest for Photographic Enlightenment -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
