The Megrez Fl. showed a somewhat crisper image at moderate seeing, but at moments of good to very good conditions the Megrez ED gave us identical views.

• 两片的萤石在一般的大气条件下，画面显得稍微新鲜些；但是当大气条件变得非常好的时候，三片的ED也可以达到同样的效果。