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CaK Omega filter - latest trials
I've been testing the Omega stack with various elements/ tilt settings and comparing the CWL (central wavelength) and FWHM results with the spectroscope...
The best results so far are with the combo of the Baader CCD-D filter as an ERF, the 394nm 80nm as a semi-blocking filter and the 393.4nm 2A as the final trimming filter.
Conditions haven't been the best - wind, rain and average seeing, combined with a pretty quiet surface.
Using the ED80 and the ASI 1600 as well as the ASI 174 - both with/ without the x2.25 Barlow.....
The attached image was obtained with the ASI 174, x2.25 barlow, processed in AS3!, with curves in Registax6.
Looks promising.
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