Thread: canon 90-300?
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  #13  
Old 04-06-07, 23:00
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miketoll miketoll is offline  
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Originally Posted by Don Hoey View Post
I hope this link explains http://en.wikipedia.org/wiki/Apochromat

Don
By the time I had finished typing my message and posting it Don puts a much better answer up! Ah well .
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