[ATM] Shroud v.s no shroud

[Mel Bartels]

> That prompted me to really test whether the baffling was adequately
> keeping
> all light out of the optical path. I was quite surprised how much of the
> area around the primary needs to be masked off. The choice was either to


Ideally the focuser baffle minimizes the primary mirror baffle size by
greatly reducing the angle of the cone where light can enter the focal
plane.  If it doesn't, then the focuser baffle is too close to the bottom of
the focuser, or the diagonal is oversized.  The diagonal's edge is a baffle.

Mel Bartels