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@DenverShooter Please keep us updated on your 800mm. I hope you get it before July...that is when we will be in Colorado...so maybe you will bring it along so some of us can get to see and if possible play with it.
Indeed, maximum sharpness, even with super telephoto lenses is still going to be at distances less than 50 meters. Beyond 50 meters atmospheric conditions start to break down detail.