Icosahedron Posted September 9, 2021 Share Posted September 9, 2021 Ca II K, Fe I (432.56 nm), H-beta, Mg I (518.36 nm), Na I (589 nm) and H-alpha: True colour: False colour: 14 Link to comment Share on other sites More sharing options...
Pete Presland Posted September 10, 2021 Share Posted September 10, 2021 Interesting set of images there, good to see it in many wavelengths. 1 Link to comment Share on other sites More sharing options...
Merlin66 Posted September 11, 2021 Share Posted September 11, 2021 Very nice collection, well presented. I'm testing a MiniSHG based loosely on Christian Buil's SolEx design (but without the 3D printing) The associated INTI software by Valerie Desnoux is exceptionally fast and can present the images (based on 16bit SER files) in seconds!! I didn't include H beta in my quick run of multi-wavelengths but did record all the rest. Using the ASI 178 with 9 sec scans in Declination. 3 Link to comment Share on other sites More sharing options...
Luke Posted September 11, 2021 Share Posted September 11, 2021 Very nice, well done! 1 Link to comment Share on other sites More sharing options...
Icosahedron Posted September 11, 2021 Author Share Posted September 11, 2021 Hi Ken, Very nice detail you have there, what telescope objective do you use with your setup? I eventually upgraded to a 2400 lpmm grating and already being borderline in the UV had to opt for a 90 mm objective (AliExpress) to compensate for light loss due to the wider dispersion. Link to comment Share on other sites More sharing options...
Merlin66 Posted September 12, 2021 Share Posted September 12, 2021 Ico, I'm using an ED80 stopped to 60mm plus either a Baader Ha 7nm ERF or just an ND0.9 for other wavelengths. https://groups.io/g/astronomicalspectroscopy/topic/85342534? 2 Link to comment Share on other sites More sharing options...
Montana Posted September 14, 2021 Share Posted September 14, 2021 Wow!! absolutely phenomenal Alexandra Link to comment Share on other sites More sharing options...
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