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Any interest in a Spectroheliograph build?
Now I've committed to buying an ASI174MM camera (fast frame, ROI), I can get "serious" about the folded telescope/ Littrow spectroheliograph (SHG) build.
Is there any interest locally in discussing the design and construction?
Just a reminder - the SHG is capable of providing solar images at very narrow bandwidth (<0.2A) with the image wavelength anywhere in the visible spectrum - CaH/CaK, Fe, Mg, Na, Hbeta/Halpha etc. etc.
The total construction cost is less than the price of a large ERF (!) never mind the costs of the various etalon/ blocking filters.
Feedback welcome.
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