So there is plenty of good EE Vblogs like mikeselectricstuff, eevblog, TSP and a few other very decent ones.
There is plenty of good mechanical blogs like ox-tool-co
Then there are some multidisciplinary ones like AVE
But is there anyone for optics? Stuff like telescopes, microscopes, binoculars, monoculars.. I don't mean photo camera performance but actual optical systems engineering/analysis that consist of mirrors and lens and whatever else. The laser blogs seem to focus more on power... but I have yet to see something like a professional tear down a binoculars in the dave jones analysis way