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It's likely that you could improve sharpness a lot by stopping down to f4 or 5.6. Most lenses, esp long ones tend to get a little soft when shooting with them wide open. The moon is bright enough to shoot at smaller apertures with ease if you use a tripod. I think that you will have a great time shooting with the new 2.8. It makes composing and focusing a lot easier because of the brightness in the viewfinder. |