Maybe its the Nikon and not the Sigma. The AF on my 1.4x EX and 100-300/4 EX works just fine on a PZ-1p. The 2x would probably work just as well in bright daylight, but at 600/f:8 it might have a problem in low light situations. ;-)
On Sunday 22 December 2002 02:25 am, John Mustarde wrote: > I agree - check the Sigma website. But also go to the camera store > and see if the Sigma APO TC even has the Pentax AF drive pin - it may > not have it. > > Sigma is notorious for making "AF" teleconvertors which do not > autofocus at all with any lenses. I've got one in Nikon mount - Sigma > 1.4x APO AF TC for sale for $95 plus shipping. -- Ken Archer Canine Photography San Antonio, Texas "Business Is Going To The Dogs"
