Both Intes and Intes-Micro did, for all their Mak-Netwonians. They placed a precision circular metal aperture disk over the primary which also prevents it falling out of the cell.
Images don't show diffraction effects around bright stars - as commonly seen from scopes with exposed mirror clips, as well as the spikes from secondary spiders.
Edited by luxo II, 27 February 2024 - 10:52 PM.