Thanks 250swb. I have owned the f-mount 105 D for 25 years, and I can say it's probably my most used lens. I still love it. I'm sure the Z mount version is better still. For me this is a very practical question as I'm interested in the possibility of digitising 4x5 at high resolution without stitching. Since first posting here I've read online some very convincing initial tests of the z8's new functionality - suggesting nearly 90% more resolution, but not tested specifically with the micro Nikkor 105 Z.