Sirius diffraction spikes on focused 203mm Newtonian
1,543 views · Published 2 January 2013 · 1:38 · Indexed 15 October 2026
Channel: pink manta · 2013 · Science & Technology
This video was made right after a careful but equipment-poor collimation. An asymmetrical longer spike is constantly seen, even with the scope in focus, achieved with a Bahkinov mask. Although this collimation might have been imprecise enough for such asymmetry, it is possible that the cause for this is related with poor optics, namely the secondary mirror coating.
