WO 81 シリーズ望遠鏡用 Bahtinov マスクカバー（特許取得）(CPBM-81)

The mask snaps onto my GT81 perfectly with no play, and focusing stars snapped into crisp diffraction spikes on the first try. It’s a solid upgrade that makes achieving perfect focus almost effortless.

The gold finish looks even better in person than I expected, and the mask snapped onto my telescope tube securely with zero play. I had a sharp focus on Jupiter within seconds after my first try using it.

The gold finish matches my telescope tube perfectly, and the mask snapped into place on the first try with a satisfying click. Focus was dead-on after just one test shot.