Re: [Utah-astronomy] Secondary heaters

What I'm told is that the total resolution loss due to diffraction from the curved supports is still there, just not visible as spikes since it's spread-out to a level below the threshold of visibility.

There might be more to it than that. I think the total amount of diffraction components is lower because there are only two vanes instead of three or four. The vanes themselves are pretty thin, since much of the rigidity of the structure is provided by the spring tension of the vanes. But certainly there's still schmutz in there, just spread around.