Originally posted by dadipentak I used that calibration service with my 50-150/2.8...and it came back sharp as a tack.
I had to send my 30mm 1.4 in for calibration to my camera body, and sent my 50-150mm in at the same time since it needed a firmware update anyway (to focus in liveview). The tech tested the 50-150mm on my K-x, and said it was already "right on the money", so I guess I got lucky there.
A bit off topic, but I notice that you own both the 50-150mm f2.8, and the 70-200mm f2.8. Which lens did you own first? What made you buy the other? Now that you own them both, do you find yourself neglecting one? Do you feel like the extra reach from 150-200mm is worth the extra size/weight of the 70-200mm and the loss of the 50mm wide end?