I am interested in purchasing the subject lenses. I realize these lenses do not have great coverage. I am interested in your opinions on how these lenses rate on sharpness, resolution and contrast compared to current lenses such as APO Sym mars, etc. Chris Perez's website does not have a test on the Zeiss lenses. Has anyone performed a resolution test on these lenses? One final question: Are " Linhof select" lenses any better or are you just reducing the probability of get ting the occasional "dud"? Thanks for your help!