View Single Post
  #2  
Old 04-04-07, 15:50
postcardcv's Avatar
postcardcv postcardcv is offline
Super Moderator
 
Join Date: Dec 2005
Location: Norfolk
Age: 48
Posts: 1,856
Default

I've tested a 1.4x tc (actually tried both Kenko and Sigma) on the 170-500 with a 350D - neither gave AF and there was an obvious drop in IQ. Personally I wouldn't recommend using a tc with this lens.
Reply With Quote