I have used my Summicron 50mm and 90mm lenses on my GX1 with great results. However if I use them on my GX7 I get all kinds of chromatic yuk plus the images are out of focus. I am using focus peaking etc. and it shows things should be in focus. Any suggestions? BTW my Nikon glass works just fine on my GX7. The Leica lens work fine on both my M4 and M5.