Hello,
today between clouds & rain in paris...
to be continued...
(diffraction grating 1800 lines/mm) and NO stacking
Chris
prom of May 26th wide slit spectro coronograph
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prom of May 26th wide slit spectro coronograph
spectro-coronographe ,Bresser 127/1200 ; Bresser 102/1350 , ASI 178MM
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