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My little 80 has rather bad CR really but it is very handy. Perfection is not cheap so it is a case of using what you get accept the short comings you percieve and enjoying what it delivers. CR means in effect a poor focus but it is hardy noticable unless you simply wish to complain that it could be better...I have a 150ar worth maybe $1000 it is very good when you realise that a triplet 150 is about $15,000.... dure Icould notice the difference but its not woth $14,000 to have the best... I think even qhat many call poor optics are not that bad really.
alex
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