Check out this amazing video where you can see eight huge ETVs.

I wonder if astronomers amateurs do this (I suppose), then what do those who have large telescopes or entire observatories do. Obviously, they should replace the lenses or even wear glasses to the operator. :)

This is certainly not an isolated case. You can find other videos where you can see more than a series of vibrating pixels. Ships that clearly shadow the moon, change direction, accelerate, slow down, disappear, and appear ...