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Old 22-11-2014, 08:22 PM
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Merlin66 (Ken)
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Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,927
Hmmm,
probably too short an exposure...
I have a neon bulb illuminating the slit - a distance of about 60mm and still need 8sec exposure to get good neon reference lines.
What exposures were you using?
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