aramitsharma Posted January 15, 2022 Share Posted January 15, 2022 Hi anyone having any experience using this filter along with the solar film on the front objective? https://www.altairastro.com/altair-nuv-7nm-125-filter-6910-p.asp Link to comment Share on other sites More sharing options...
Merlin66 Posted January 15, 2022 Share Posted January 15, 2022 Sounds very much like the Baader K-line version (8nm). Should work well with a Herschel wedge or the recommended ND3.8 film. 1 Link to comment Share on other sites More sharing options...
Nigella Bryant Posted January 15, 2022 Share Posted January 15, 2022 Yes does sound similar to the baader k-line filter. Even though it' says CaK it's to broad a wavelength at 7nm so will only show more contrast in the white light spectrum. Nothing wrong with that, I use the baader k-line filter for white light imaging. Recently imaged yesterday using it with a Hershel wedge and an 80ed refractor. 1 Link to comment Share on other sites More sharing options...
aramitsharma Posted January 16, 2022 Author Share Posted January 16, 2022 2 hours ago, Nigella Bryant said: Yes does sound similar to the baader k-line filter. Even though it' says CaK it's to broad a wavelength at 7nm so will only show more contrast in the white light spectrum. Nothing wrong with that, I use the baader k-line filter for white light imaging. Recently imaged yesterday using it with a Hershel wedge and an 80ed refractor. Looks interesting... so not strictly as good as dedicated CaK, but still good... 1 Link to comment Share on other sites More sharing options...
Nigella Bryant Posted January 16, 2022 Share Posted January 16, 2022 8 hours ago, aramitsharma said: Looks interesting... so not strictly as good as dedicated CaK, but still good... No not even close to a dedicated CaK filter. Attached recent comparison from the 14th. 3 Link to comment Share on other sites More sharing options...
Pete Presland Posted January 16, 2022 Share Posted January 16, 2022 Excellent example of the difference Nigella between the filters. I thought about one a few few years back, but i didn't think it was worth the investment. I would love a Ca-K scope though 🙂 1 Link to comment Share on other sites More sharing options...
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