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Old 13-03-2011, 08:39 AM
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tlgerdes (Trevor)
Love the moonless nights!

tlgerdes is offline
 
Join Date: Mar 2009
Location: Sydney
Posts: 2,285
From what I understand, the "goldilocks zone" is between 1-2 arc-sec/pixel. Starting at 2 for 900mm means you wouldnt be doing yourself any favours if you shorten your focal length in the future. I would be shooting for 1.5.
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