Here's an earlier (not the first) post with an "eye opener" target.

August 6 2012 at 10:55 PM

Yrrah  (Login Yrrah)
YF


Response to First time I heard about tht method Harry but I'll sure give that a try! - nt

Read the description of what was done and I think you will be impressed:

http://www.network54.com/Forum/79537/thread/1196820182/Parallax++error+and+group+shooting+with+objective+lens+stop+down+card+--+revisited-

As I implied I picked this up 50 + years ago from bush shooters in OZ.

Kind regards, Harry in OZ.

 
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