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Message: <blockquote data-quote="typo" data-source="post: 3598401" data-attributes="member: 83808">Jerry, It isn't me that's being ignorant. The internet, and indeed the forum, is full of information on the topic. Don't take my word for it, just Google it!Back in the 19th century someone arbitrarily decided that the ability to resolve a spacial frequency of 1/60th of a degree (one arcminute) or better would be called normal vision. On a regular test chart that line underlined in red, is calbrated for feature difference of one arc minute at 20ft or 6m. The range of normal vision is usually described as between 20/20 and 20/10 which is exactly two fold better. That range will accout for the majority of visitors to the forum. 20/20 would put you in the bottom quartile of 20 to 60 year olds. It also means that would be totally scientifically impossible for you to resolve any more detail with any binocular at any price than that $25 binocular of mine. Those are the facts. Don't blame me if they are inconvenient. David</blockquote>