Originally posted by koper the photos which you refere was made with Tamron 1.4 TC and Sigma 70-300APO
not with Pentax SMCP-DA* 300mm f/4 ED
i have sigma 70-300 lensess and they work good with kenko 1.5 * tc
the lensess did not work with Pentax SMCP-DA* 300mm f/4 ED
do you have experience with this lenses????
I hope your not refering to the first page, because buried someplace in the 20's there are examples of mine and others using the DA*300 f/4.0 with Tamron MC-4 TC working well with the SDM lenses...No such luck . atleast for me with the Kenko 1.5tc..