BAADER D-ERF ENERGY REJECTION FILTER polemaster The system has been carefully

The system has been carefully designed for ease of setup and use in low-light conditions

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for Windows the mount can be aligned and controlled directly from a PC

the Hyperion Aspheric eyepieces are a compelling offering for an attractive price

The glass path correctors 1

BAADER D-ERF ENERGY REJECTION FILTER polemaster The system has been carefullyThe Baader D ERF Energy Rejection Filters are dielectrically coated to reject the majority of light at both ends of the spectrum, with a narrow transmission window of only 80nm half bandwidth around the H alpha line. This enables safe usage of H alpha solar filters with telescopes larger than 80mm in aperture by preventing as much extra energy as possible from entering the telescope. Note: an additional filter cell will need to be custom 3D printed