Backyard Universe Primary Mirror Mask for Sky-Watcher 130mm Newtonian Telescopes

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Backyard Universe Primary Mirror Mask for Sky-Watcher 130P-DS Newtonian Telescope.

CNC milled aperture ring made of matt black anodised aluminium (EN AW-6061), suitable for Skywatcher 130PDS. 

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. 

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