wanted: Solarscope SF-50 or other with FSR~10A

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antonf
The Sun?
The Sun?
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Joined: Mon Jul 23, 2018 5:56 am

wanted: Solarscope SF-50 or other with FSR~10A

Post by antonf »

I'm looking for Solarscope SF-50 or similar etalon without central vignetting and with free spectral range of ~10A (not 15A as in Lunt).


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