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2*Retekess TD019 button transmitter
things for classes or conferences in advance
suitable for a large international convention
allows for simultaneous interpretation of up to 15 languages for each interpreter unit
good light collecting ability
Astronomik H-alpha 6nm CCD MaxFR 1.25" (M28.5) Filter for Fast Systems astrophotography camera 2*Retekess TD019 button transmitterAstronomik H alpha 6nm CCD MaxFR 1,25'' (M28,5) 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 emission line filters is perfectly
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