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Alan,
I used the Takahashi FS-60C scope with the Tak 1.7x module turning the scope into an f/10. I used double stacked Coronado SM60's Etalons on the front of the scope. At the focuser end I use a BF30 filter followed by a Tele Vue 2x Powermate Barlow. The images were captured using the ZWO ASI174MM camera.
George
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