Forum der Vereinigung der Sternfreunde

Forum of the German Amateur Astronomy Association
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PostPosted: 28. June 2018, 16:21:22 PM 
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Nutzer
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Joined: 06. December 2016, 11:37:47 AM
Posts: 42
A new doublet specifically dedicated to the eShel spectrograph is now available as an "upgrade" for eShel owners. It allows to get a better focus of the spectra on a larger number of orders, see the article that describes the improvements on the following link:
http://o.garde.free.fr/eShel-II.pdf


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