<p>I have an odd problem with my Nikon 70-200mm G VRII lens. It isn't focussing sharply across a plane. There's like a vignette sharpness effect, where a circle in the centre is good, but everything outside it is well out. The issue persisst beyond f/8, though I should be a able to get a full sharp plane even at f/2.8.<br> Initially I thought it was my dodgy composition / focussing on real-world images, but as the issue presented on more and more pix, I began to realise the issue was real, which is why I did the uninspiring but illustrative images you can see here...<br> https://www.flickr.com/photos/120569583@N02/<br> Please take a look and tell me what you think.</p>