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So the number of for example "H-alpha-photons" does not change significantly whether an H-alpha filter is installed or not
5mm eye relief range allows eyeglass wearers to enjoy the entire field of view without needing to remove their glasses
2-Group Lens Structure
Svbony SV48P Telescope Sturdy Design
easy-to-use focus wheel allows quick and easy focusing
Astronomik SII 12nm CCD MaxFR 31mm Filter for Fast Systems Dovetail Clamp So the number of forAstronomik SII 12nm CCD MaxFR 31mm MaxFR Astronomik photographic narrowband emissionline filters for fast optical systems. There is an ever growing demand for filters suitable for extremely fast optical systems like Celestrons RASA and the Epsilon Astrographs made by Takahashi. Our novel MaxFR emission line filters are suitable up to very fast focal ratios. The new Astronomik MaxFR series of narrowband emissionline filters is perfectly matched to the
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