I was curious to know if anyone has any experience with the Schneider 2X Teleconverter?
I am considering one to use with my 150mm Phase one lens, effectively converting it to a 300mm lens.
This would be a handy telephoto lens to use at times, but I have not seen any reviews of the teleconverter yet.
We tested ours and found the optics, size/weight to both be big pros. The lack of autofocus is a fairly big bummer. But for tripod based static subject matter shooting work the focus-confirmation was an adequate substitute.
As expected the biggest challenge to getting sharp images was not the optics, but getting sufficient tripod support and vibration-reduction to a sufficient level. This was especially true of making the 240mm into a 480mm.
If at all possible if suggest working with a dealer that will rent you one to try before you commit to the purchase.