I did a cursory search on the forum, and I browsed Wiki...but maybe I missed it.
What is that big Flap/Door on the end of the scope.?
Is it part of the optics, or is it a protection device, or a...?
Thank You
Yeah...that makes sense.
My questions always sound so baffling (to me) when I ask them, but the answers always seem so obvious when you guys post them. :redface:
Thanks Again
Keeping in mind I am a person that did not go to school...This must be a common question. Can be maddening for you guys to keep reading it over and over. Would be happy to read any links you want to post.
I did a search on Gravity and Orbit, and did not see this topic. But those words garner a...