The Nikon Monarch 5 has ED glass. It is the lowest priced riflescope featuring ED glass that I know of. For the price, it is an outstanding riflescope. It also has a 5X zoom ratio. Which model did you purchase?
This is showing a 4X zoom.
https://www.natchezss.com/nikon-monarch-m5-rifle-scope-3-12x42-sf-30mm-mk1-moa-reticle-matte.html