Thread: Coal Sack to Carina
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Old 07-05-2021, 06:11 PM
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Merlin66 (Ken)
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Join Date: Oct 2005
Location: Junortoun Vic
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Michael,
Thanks for that.
That’s an effective aperture of around 6mm. I would like to think the 25mm grating could give useable spectrum of 6-7 mag target stars.
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