If you're an amateur astronomer and you use a Telrad finder, that's a distant descendant (much simplified) of the Norden sight. Sure there are better solutions

If you're an amateur astronomer and you use a Telrad finder, that's a distant descendant (much simplified) of the Norden sight. Sure there are better solutions nowadays, including finders that are actually mini-telescopes, but the low-tech Telrad is still popular for its air of nostalgia.