Hands on with the 70-200 and 150-400:
http://www.bhphotovideo.com/explora/phot...tax-lenses
"I was also able to check out the HD PENTAX D FA* 70-200mm f/2.8 ED DC AW lens. It is a large, comfortable zoom that's incredibly fast and confident when acquiring autofocus. Also, the manual focus ring was very smooth and located in the perfect spot to support the lens and adjust focus with just one finger. I found it a bit larger than need be, but functionally very impressive. The HD PENTAX D FA 150-450mm f/4.5-5.6 DC AW lens was just a beast. With its red dot sight, it found focus and tracked well, but it, too, was very big, even for such a powerful zoom range, and its rings didn’t rotate too smoothly."
http://www.bhphotovideo.com/explora/phot...tax-lenses
"I was also able to check out the HD PENTAX D FA* 70-200mm f/2.8 ED DC AW lens. It is a large, comfortable zoom that's incredibly fast and confident when acquiring autofocus. Also, the manual focus ring was very smooth and located in the perfect spot to support the lens and adjust focus with just one finger. I found it a bit larger than need be, but functionally very impressive. The HD PENTAX D FA 150-450mm f/4.5-5.6 DC AW lens was just a beast. With its red dot sight, it found focus and tracked well, but it, too, was very big, even for such a powerful zoom range, and its rings didn’t rotate too smoothly."