BAADER D-ERF ENERGY REJECTION FILTER polemaster GSO Ritchey-Chretien 254mm f/8 with

GSO Ritchey-Chretien 254mm f/8 with truss carbon fiber tube and ESATTO 3" and the following optional accessories: EAGLE with PLUS dovetail clamp installed above the telescope

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#2 Extended Full Well: ideal for objects with bright stars or strong contrast

Optical thickness 0 mm Connection telescope side M42 x 0

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

BAADER D-ERF ENERGY REJECTION FILTER polemaster GSO Ritchey-Chretien 254mm f/8 withThe 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