I don't recall ever having a problem with fogging or hazyness at dusk. Whether your problem is because of the scopes you are using, I don't know. My rifles and encore pistols all have Nikon, Weaver, Sightron, or Burris scopes on them. Your best bet is to go to a local gun dealer/gun shop about the time it's getting dark and look through some of his scopes. I can heartily recommend Sightron SII 6x42 and Nikon Monarch scopes for rifles, particularly in dusk and twilight shooting situations. The Weaver 6x40 K6 scope is also good.