Just got off the phone with a Leupold rep. This is absolutely the case with spotting scopes and binos. He stated that because of the covid restrictions in Oregon and the high demand during the pandemic some of the lower price point scope glass was procurred from an outside vendor. He told me to listen to the Leupold "core insider " podcast that discusses this. I cannot find that episode in the app store. As you read the above statement it states " enough " not all. Don't worry about being snarkey, I like good banter.