> fra: "Rob Studdert" <[EMAIL PROTECTED]> > > On 21 Oct 2005 at 15:44, [EMAIL PROTECTED] wrote: > > > In the 645D system they will need one new wide angle and use the best part > > of > > the old lenses. In addition they will have plenty of room for more and/or > > larger > > pixels than the FF sensors. So the 645D may always give better image > > quality > > than the FF. > > You are assuming that the current line of 645 lenses are up to the job, from > my > testing they are far poorer performers than their 35mm equivalents, they rely > on the lower mag factor per print size to cover their inadequacies.
So, in that case I would need new lenses anyway because my small format lenses will not be very good on full frame. I've even discovered some purple fringing on my 135 1.8 at small apertures (luckily I usually dont stop down much). Anyway. I don't know which parametres you have tested, but resolution is not necessarily the most important issue for a sensor. Anything below the size of the "bayer pixel" is unecessary for the lens, and you may even have some advantages in some noise issues and moire if the "bayer sensors" are smaller than the lens resolution. I'd prefer lenses with less PF, CA, distortion and vignetting. DagT DagT
