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H-alpha fulldisk setup based on Quark | by Tommi R
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H-alpha fulldisk setup based on Quark

90 mm Baader D-ERF with a diy plywood housing, Sharpstar 61 EDPHii, Daystar Quark, Daystar reducer and ZWO ASI174mm. And a bunch of suitable adapters & extensions.


This is my go-to setup for full disk solar hydrogen alfa. With the setup the whole disk with protuberances just fits on the 174mm sensor with little to spare.


Apo is an overkill for very narrowband imaging like solar hydrogen alfa but I did not find anything else suitable with a proper and solid focuser. All in all I'm pretty satisfied with the setup as there seems to be no Newton rings eliminating the need for flats.

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Taken on June 10, 2021