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The pager housing has minimal exposed gaps
The MaxFR H-alpha-CCD filter is perfect for capturing the rich red emission lines from nebulae
The keypad transmitter ID could be set from 1 to 999
The filter works by blocking the wavelengths or mercury and sodium-vapour used in urban lighting while letting the visible and the critical OIII
Astronomik SII 12nm CCD MaxFR Clip-Filter Sony alpha 7 Svbony The pager housing has minimalAstronomik SII 12nm CCD MaxFR Clip Filter Sony alpha 7 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
US$ 370.00
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