Most if not all of the 1x6 scopes now run a a 24mm objective which in turn means a 45mm or bigger ocular lens. The only way to get a smaller ocular is to go down in objective size and power range like some of the Leupold scopes. Alternatively Meopta and Karl Kaps make a 1-4 which has a smaller ocular, about 40mm if I remember correctly. Its definitely a problem with rifles that turn through 90 degrees, one of the reasons so many companies now make a rifle that turns through 60 degrees.

Matt.