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Model: bu_pmm_sw150Part Number: BU2022-005
CNC milled aperture ring made of matt black anodised aluminium (EN AW-6061), suitable for Skywatcher 150PDS/P/Quattro.
This precisely manufactured aperture ring, for mounting on the primary mirror, reliably covers the mirror brackets and the outer area of the primary mirror, thus helping to avoid unwanted diffraction effects caused by the brackets and a sloping mirror edge.
A 2mm chamfer in the inner ring minimises unwanted residual reflections on the primary mirror from the inner edge of the aperture.
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