Leigh B. , Aug 27, 2011; 07:48 p.m.
I bought a CFV-39 over a year ago and love it. The quality of the images is absolutely outstanding.
I got it before the CFV-50 was introduced, and have never used the 50, so I can't compare the two.
I use it with a 555ELD body, and that's a great combination. I can shoot tethered to my MacBook Pro in the studio and never have to touch the camera except to compose and focus.
Hasselblad makes a program called Phocus that does all the processing you might want, including correction of optical aberrations for all the V-series lenses. It's free at the Hasselblad website www.hasselblad.com or www.hasselbladusa.com although you do have to register, which you should do anyway.
Phocus also controls the camera for tethered shooting.