This lens chart that I referenced often is no longer available. I have reposted it on my website in case anyone has been looking for it. You can find a link to it on my articles and links page. If anyone has pictures of specific lens examples they would like to contribute, I will add them to the page.
http://www.willwilson.com/byfl.htm
or
http://www.willwilson.com/articles.html
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