Originally posted by lepiallou Yes I used a Kenko Pz-af and I was not disappointed.
But I also heard that Tamron TC is Kenko rebranded... And as they tend to be hard to find I guess you can go for the first one you will find
That is crazy talk! Everyone knows the Kenko is Tamron rebranded
Actually alot of these pz-af teleconverters from multiple different brands appear quite similar to the point of looking like multiple re-brands, they mostly contain the same terminology as well (like MC4, MC7, even PZ-AF in some cases).
I'm definitely not saying that tamron are the only ones that work...just that I've tried both the 1.4x and 2x pz-af with varying success on a K-5 (and more success with sigma's hsm than pentax's sdm, even on a slower lens, the sigma 120-400mm vs the pentax 50-135mm).