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the SV181 is suitable for both visual observing and lightweight imaging setups
Long Working Distance
ensuring no shift in the focal plane when changing filters
If you must observe from light-polluted areas
The ideal aperture ratio for this filter ranges from f/4
Astronomik UHC-E 1.25'' Filter – Boost Contrast for Small Telescopes Takeaway Pager System the SV181 is suitable forAstronomik UHC E 1. 25'' (M28. 5) Our 1. 25" (M28. 5) filters fit perfectly in all 1. 25" (M28. 5) filter wheels of brands like ZWO, QHY, QSI, Starlight Xpress, SBIG, Moravian, and Atik. The orientation of the filter in the filter wheel does not matter. It does not change the optical performance. The Astronomik UHC E filter is our budget filter for deep sky observation of emission nebulae and comets under light polluted skies. Its particularly
