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Old 06-01-2017, 09:46 PM
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p1taylor
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Join Date: Jan 2008
Location: coventry uk
Posts: 734
Diy spectroscope

Am I right is*NEON 1SEC--2 a Order 0 image do I go a little left or right to get to Order 1,**NEON 1SEC--1 is slit well open.

peter
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