[konstantinos75]

Hi
In the last years the telescope I use the most for astrophotography is Vixen ED81s with the focal reducer f/5.2.
The camera to capture images is sbig st2000xm

The problem with Vixen ED81s is that it makes star spikes on the brightest stars. These spikes are typical of this telescope and are caused by the three metallic holders underneath the main mirror (they are pointed by the red arrows on the image).

I would like to ask if someone has solved this problem e.g. by using an aperture mask...

Thank you, Konstantinos