>>3267661I did some testing to see what the widest object to see through could be. The tube you see in this video is a 2.5" diameter telescope. Even at infinity it can still obscure the 3.7" wide mirror lens. The tube was right at 6.6' from the mirror lens while the trees are 100' or more away I think. A larger/closer object obscures more so you have to focus further past it in order to get it out of sight as much as possible. I've used this mirror lens through near-closed window blinds to take photos of birds on my porch and it pretty much erases the blinds completely.
