How bad of front/back focus warrants a return on a brand new 1500 dollar lens?

Started Oct 13, 2013 | Discussions thread
deanfuller
Junior MemberPosts: 39Gear list
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Re: How bad of front/back focus warrants a return on a brand new 1500 dollar lens?
In reply to BigGG, Oct 14, 2013

"www.friedmanarchives.com"

This is not very helpful.  Is this procedure in one of his books or pay article$?  Or is it a blog post?  I can't find anything at that site.

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