Why is the view of faraway scenes through my high-power spotting scope so blurry?

Terrestrial viewing is best done with a magnification of 15x to 60x. If you exceed 60x magnification, a view can be blurry because the of earth’s atmosphere. Heat waves and high-altitude winds move air around and cause differing temperatures of air to mix. This makes the air act like a weak lens that interferes with the light from a distant object, especially on a hot day. This "bad seeing" can drastically distort your image. Early mornings are best for high power viewing with your spotter because the air temperature is more constant.

Updated 12/18/13