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Message: <blockquote data-quote="Paul Corfield" data-source="post: 1490076" data-attributes="member: 19132">Water and air temperature usually differ so the air at the surface can be quite turbulent and result in shimmering and mirage like effects in the photo. Once you go for long distances, atmospheric effects will always limit your end result rather than the gear you are using. Even with my cheap Skywatcher 80ED I can read the name and numbers on a jumbo jet at cruising altitude which is around 12km or 40,000 feet. On a bad day it is just a blur, just depends on the weather, air temperature etc. Paul.</blockquote>